diff --git a/packages/backend/src/misc/create-temp.ts b/packages/backend/src/misc/create-temp.ts
index 04604cf7d..f07be634f 100644
--- a/packages/backend/src/misc/create-temp.ts
+++ b/packages/backend/src/misc/create-temp.ts
@@ -1,10 +1,19 @@
 import * as tmp from 'tmp';
 
-export function createTemp(): Promise<[string, any]> {
-	return new Promise<[string, any]>((res, rej) => {
+export function createTemp(): Promise<[string, () => void]> {
+	return new Promise<[string, () => void]>((res, rej) => {
 		tmp.file((e, path, fd, cleanup) => {
 			if (e) return rej(e);
 			res([path, cleanup]);
 		});
 	});
 }
+
+export function createTempDir(): Promise<[string, () => void]> {
+	return new Promise<[string, () => void]>((res, rej) => {
+		tmp.dir((e, path, cleanup) => {
+			if (e) return rej(e);
+			res([path, cleanup]);
+		});
+	});
+}
diff --git a/packages/backend/src/queue/processors/db/export-blocking.ts b/packages/backend/src/queue/processors/db/export-blocking.ts
index 166c9e4cd..f5e0424a7 100644
--- a/packages/backend/src/queue/processors/db/export-blocking.ts
+++ b/packages/backend/src/queue/processors/db/export-blocking.ts
@@ -1,11 +1,11 @@
 import Bull from 'bull';
-import * as tmp from 'tmp';
 import * as fs from 'node:fs';
 
 import { queueLogger } from '../../logger.js';
 import { addFile } from '@/services/drive/add-file.js';
 import { format as dateFormat } from 'date-fns';
 import { getFullApAccount } from '@/misc/convert-host.js';
+import { createTemp } from '@/misc/create-temp.js';
 import { Users, Blockings } from '@/models/index.js';
 import { MoreThan } from 'typeorm';
 import { DbUserJobData } from '@/queue/types.js';
@@ -22,73 +22,72 @@ export async function exportBlocking(job: Bull.Job<DbUserJobData>, done: any): P
 	}
 
 	// Create temp file
-	const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
-		tmp.file((e, path, fd, cleanup) => {
-			if (e) return rej(e);
-			res([path, cleanup]);
-		});
-	});
+	const [path, cleanup] = await createTemp();
 
 	logger.info(`Temp file is ${path}`);
 
-	const stream = fs.createWriteStream(path, { flags: 'a' });
+	try {
+		const stream = fs.createWriteStream(path, { flags: 'a' });
 
-	let exportedCount = 0;
-	let cursor: any = null;
+		let exportedCount = 0;
+		let cursor: any = null;
 
-	while (true) {
-		const blockings = await Blockings.find({
-			where: {
-				blockerId: user.id,
-				...(cursor ? { id: MoreThan(cursor) } : {}),
-			},
-			take: 100,
-			order: {
-				id: 1,
-			},
-		});
+		while (true) {
+			const blockings = await Blockings.find({
+				where: {
+					blockerId: user.id,
+					...(cursor ? { id: MoreThan(cursor) } : {}),
+				},
+				take: 100,
+				order: {
+					id: 1,
+				},
+			});
 
-		if (blockings.length === 0) {
-			job.progress(100);
-			break;
-		}
-
-		cursor = blockings[blockings.length - 1].id;
-
-		for (const block of blockings) {
-			const u = await Users.findOneBy({ id: block.blockeeId });
-			if (u == null) {
-				exportedCount++; continue;
+			if (blockings.length === 0) {
+				job.progress(100);
+				break;
 			}
 
-			const content = getFullApAccount(u.username, u.host);
-			await new Promise<void>((res, rej) => {
-				stream.write(content + '\n', err => {
-					if (err) {
-						logger.error(err);
-						rej(err);
-					} else {
-						res();
-					}
+			cursor = blockings[blockings.length - 1].id;
+
+			for (const block of blockings) {
+				const u = await Users.findOneBy({ id: block.blockeeId });
+				if (u == null) {
+					exportedCount++; continue;
+				}
+
+				const content = getFullApAccount(u.username, u.host);
+				await new Promise<void>((res, rej) => {
+					stream.write(content + '\n', err => {
+						if (err) {
+							logger.error(err);
+							rej(err);
+						} else {
+							res();
+						}
+					});
 				});
+				exportedCount++;
+			}
+
+			const total = await Blockings.countBy({
+				blockerId: user.id,
 			});
-			exportedCount++;
+
+			job.progress(exportedCount / total);
 		}
 
-		const total = await Blockings.countBy({
-			blockerId: user.id,
-		});
+		stream.end();
+		logger.succ(`Exported to: ${path}`);
 
-		job.progress(exportedCount / total);
+		const fileName = 'blocking-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.csv';
+		const driveFile = await addFile({ user, path, name: fileName, force: true });
+
+		logger.succ(`Exported to: ${driveFile.id}`);
+	} finally {
+		cleanup();
 	}
 
-	stream.end();
-	logger.succ(`Exported to: ${path}`);
-
-	const fileName = 'blocking-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.csv';
-	const driveFile = await addFile({ user, path, name: fileName, force: true });
-
-	logger.succ(`Exported to: ${driveFile.id}`);
-	cleanup();
 	done();
 }
diff --git a/packages/backend/src/queue/processors/db/export-custom-emojis.ts b/packages/backend/src/queue/processors/db/export-custom-emojis.ts
index c2467fb5f..97ba62dcf 100644
--- a/packages/backend/src/queue/processors/db/export-custom-emojis.ts
+++ b/packages/backend/src/queue/processors/db/export-custom-emojis.ts
@@ -1,5 +1,4 @@
 import Bull from 'bull';
-import * as tmp from 'tmp';
 import * as fs from 'node:fs';
 
 import { ulid } from 'ulid';
@@ -10,6 +9,7 @@ import { addFile } from '@/services/drive/add-file.js';
 import { format as dateFormat } from 'date-fns';
 import { Users, Emojis } from '@/models/index.js';
 import {  } from '@/queue/types.js';
+import { createTempDir } from '@/misc/create-temp.js';
 import { downloadUrl } from '@/misc/download-url.js';
 import config from '@/config/index.js';
 import { IsNull } from 'typeorm';
@@ -25,13 +25,7 @@ export async function exportCustomEmojis(job: Bull.Job, done: () => void): Promi
 		return;
 	}
 
-	// Create temp dir
-	const [path, cleanup] = await new Promise<[string, () => void]>((res, rej) => {
-		tmp.dir((e, path, cleanup) => {
-			if (e) return rej(e);
-			res([path, cleanup]);
-		});
-	});
+	const [path, cleanup] = await createTempDir();
 
 	logger.info(`Temp dir is ${path}`);
 
@@ -98,12 +92,7 @@ export async function exportCustomEmojis(job: Bull.Job, done: () => void): Promi
 	metaStream.end();
 
 	// Create archive
-	const [archivePath, archiveCleanup] = await new Promise<[string, () => void]>((res, rej) => {
-		tmp.file((e, path, fd, cleanup) => {
-			if (e) return rej(e);
-			res([path, cleanup]);
-		});
-	});
+	const [archivePath, archiveCleanup] = await createTemp();
 	const archiveStream = fs.createWriteStream(archivePath);
 	const archive = archiver('zip', {
 		zlib: { level: 0 },
diff --git a/packages/backend/src/queue/processors/db/export-following.ts b/packages/backend/src/queue/processors/db/export-following.ts
index 965500ac2..4ac165567 100644
--- a/packages/backend/src/queue/processors/db/export-following.ts
+++ b/packages/backend/src/queue/processors/db/export-following.ts
@@ -1,11 +1,11 @@
 import Bull from 'bull';
-import * as tmp from 'tmp';
 import * as fs from 'node:fs';
 
 import { queueLogger } from '../../logger.js';
 import { addFile } from '@/services/drive/add-file.js';
 import { format as dateFormat } from 'date-fns';
 import { getFullApAccount } from '@/misc/convert-host.js';
+import { createTemp } from '@/misc/create-temp.js';
 import { Users, Followings, Mutings } from '@/models/index.js';
 import { In, MoreThan, Not } from 'typeorm';
 import { DbUserJobData } from '@/queue/types.js';
@@ -23,73 +23,72 @@ export async function exportFollowing(job: Bull.Job<DbUserJobData>, done: () =>
 	}
 
 	// Create temp file
-	const [path, cleanup] = await new Promise<[string, () => void]>((res, rej) => {
-		tmp.file((e, path, fd, cleanup) => {
-			if (e) return rej(e);
-			res([path, cleanup]);
-		});
-	});
+	const [path, cleanup] = await createTemp();
 
 	logger.info(`Temp file is ${path}`);
 
-	const stream = fs.createWriteStream(path, { flags: 'a' });
+	try {
+		const stream = fs.createWriteStream(path, { flags: 'a' });
 
-	let cursor: Following['id'] | null = null;
+		let cursor: Following['id'] | null = null;
 
-	const mutings = job.data.excludeMuting ? await Mutings.findBy({
-		muterId: user.id,
-	}) : [];
+		const mutings = job.data.excludeMuting ? await Mutings.findBy({
+			muterId: user.id,
+		}) : [];
 
-	while (true) {
-		const followings = await Followings.find({
-			where: {
-				followerId: user.id,
-				...(mutings.length > 0 ? { followeeId: Not(In(mutings.map(x => x.muteeId))) } : {}),
-				...(cursor ? { id: MoreThan(cursor) } : {}),
-			},
-			take: 100,
-			order: {
-				id: 1,
-			},
-		}) as Following[];
+		while (true) {
+			const followings = await Followings.find({
+				where: {
+					followerId: user.id,
+					...(mutings.length > 0 ? { followeeId: Not(In(mutings.map(x => x.muteeId))) } : {}),
+					...(cursor ? { id: MoreThan(cursor) } : {}),
+				},
+				take: 100,
+				order: {
+					id: 1,
+				},
+			}) as Following[];
 
-		if (followings.length === 0) {
-			break;
-		}
-
-		cursor = followings[followings.length - 1].id;
-
-		for (const following of followings) {
-			const u = await Users.findOneBy({ id: following.followeeId });
-			if (u == null) {
-				continue;
+			if (followings.length === 0) {
+				break;
 			}
 
-			if (job.data.excludeInactive && u.updatedAt && (Date.now() - u.updatedAt.getTime() > 1000 * 60 * 60 * 24 * 90)) {
-				continue;
-			}
+			cursor = followings[followings.length - 1].id;
 
-			const content = getFullApAccount(u.username, u.host);
-			await new Promise<void>((res, rej) => {
-				stream.write(content + '\n', err => {
-					if (err) {
-						logger.error(err);
-						rej(err);
-					} else {
-						res();
-					}
+			for (const following of followings) {
+				const u = await Users.findOneBy({ id: following.followeeId });
+				if (u == null) {
+					continue;
+				}
+
+				if (job.data.excludeInactive && u.updatedAt && (Date.now() - u.updatedAt.getTime() > 1000 * 60 * 60 * 24 * 90)) {
+					continue;
+				}
+
+				const content = getFullApAccount(u.username, u.host);
+				await new Promise<void>((res, rej) => {
+					stream.write(content + '\n', err => {
+						if (err) {
+							logger.error(err);
+							rej(err);
+						} else {
+							res();
+						}
+					});
 				});
-			});
+			}
 		}
+
+		stream.end();
+		logger.succ(`Exported to: ${path}`);
+
+		const fileName = 'following-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.csv';
+		const driveFile = await addFile({ user, path, name: fileName, force: true });
+
+		logger.succ(`Exported to: ${driveFile.id}`);
+	} finally {
+		cleanup();
 	}
 
-	stream.end();
-	logger.succ(`Exported to: ${path}`);
-
-	const fileName = 'following-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.csv';
-	const driveFile = await addFile({ user, path, name: fileName, force: true });
-
-	logger.succ(`Exported to: ${driveFile.id}`);
-	cleanup();
 	done();
 }
diff --git a/packages/backend/src/queue/processors/db/export-mute.ts b/packages/backend/src/queue/processors/db/export-mute.ts
index 0ef81971f..6a36cfa07 100644
--- a/packages/backend/src/queue/processors/db/export-mute.ts
+++ b/packages/backend/src/queue/processors/db/export-mute.ts
@@ -1,11 +1,11 @@
 import Bull from 'bull';
-import * as tmp from 'tmp';
 import * as fs from 'node:fs';
 
 import { queueLogger } from '../../logger.js';
 import { addFile } from '@/services/drive/add-file.js';
 import { format as dateFormat } from 'date-fns';
 import { getFullApAccount } from '@/misc/convert-host.js';
+import { createTemp } from '@/misc/create-temp.js';
 import { Users, Mutings } from '@/models/index.js';
 import { IsNull, MoreThan } from 'typeorm';
 import { DbUserJobData } from '@/queue/types.js';
@@ -22,74 +22,73 @@ export async function exportMute(job: Bull.Job<DbUserJobData>, done: any): Promi
 	}
 
 	// Create temp file
-	const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
-		tmp.file((e, path, fd, cleanup) => {
-			if (e) return rej(e);
-			res([path, cleanup]);
-		});
-	});
+	const [path, cleanup] = await createTemp();
 
 	logger.info(`Temp file is ${path}`);
 
-	const stream = fs.createWriteStream(path, { flags: 'a' });
+	try {
+		const stream = fs.createWriteStream(path, { flags: 'a' });
 
-	let exportedCount = 0;
-	let cursor: any = null;
+		let exportedCount = 0;
+		let cursor: any = null;
 
-	while (true) {
-		const mutes = await Mutings.find({
-			where: {
-				muterId: user.id,
-				expiresAt: IsNull(),
-				...(cursor ? { id: MoreThan(cursor) } : {}),
-			},
-			take: 100,
-			order: {
-				id: 1,
-			},
-		});
+		while (true) {
+			const mutes = await Mutings.find({
+				where: {
+					muterId: user.id,
+					expiresAt: IsNull(),
+					...(cursor ? { id: MoreThan(cursor) } : {}),
+				},
+				take: 100,
+				order: {
+					id: 1,
+				},
+			});
 
-		if (mutes.length === 0) {
-			job.progress(100);
-			break;
-		}
-
-		cursor = mutes[mutes.length - 1].id;
-
-		for (const mute of mutes) {
-			const u = await Users.findOneBy({ id: mute.muteeId });
-			if (u == null) {
-				exportedCount++; continue;
+			if (mutes.length === 0) {
+				job.progress(100);
+				break;
 			}
 
-			const content = getFullApAccount(u.username, u.host);
-			await new Promise<void>((res, rej) => {
-				stream.write(content + '\n', err => {
-					if (err) {
-						logger.error(err);
-						rej(err);
-					} else {
-						res();
-					}
+			cursor = mutes[mutes.length - 1].id;
+
+			for (const mute of mutes) {
+				const u = await Users.findOneBy({ id: mute.muteeId });
+				if (u == null) {
+					exportedCount++; continue;
+				}
+
+				const content = getFullApAccount(u.username, u.host);
+				await new Promise<void>((res, rej) => {
+					stream.write(content + '\n', err => {
+						if (err) {
+							logger.error(err);
+							rej(err);
+						} else {
+							res();
+						}
+					});
 				});
+				exportedCount++;
+			}
+
+			const total = await Mutings.countBy({
+				muterId: user.id,
 			});
-			exportedCount++;
+
+			job.progress(exportedCount / total);
 		}
 
-		const total = await Mutings.countBy({
-			muterId: user.id,
-		});
+		stream.end();
+		logger.succ(`Exported to: ${path}`);
 
-		job.progress(exportedCount / total);
+		const fileName = 'mute-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.csv';
+		const driveFile = await addFile({ user, path, name: fileName, force: true });
+
+		logger.succ(`Exported to: ${driveFile.id}`);
+	} finally {
+		cleanup();
 	}
 
-	stream.end();
-	logger.succ(`Exported to: ${path}`);
-
-	const fileName = 'mute-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.csv';
-	const driveFile = await addFile({ user, path, name: fileName, force: true });
-
-	logger.succ(`Exported to: ${driveFile.id}`);
-	cleanup();
 	done();
 }
diff --git a/packages/backend/src/queue/processors/db/export-notes.ts b/packages/backend/src/queue/processors/db/export-notes.ts
index 7e12a6fac..051fcdf38 100644
--- a/packages/backend/src/queue/processors/db/export-notes.ts
+++ b/packages/backend/src/queue/processors/db/export-notes.ts
@@ -1,5 +1,4 @@
 import Bull from 'bull';
-import * as tmp from 'tmp';
 import * as fs from 'node:fs';
 
 import { queueLogger } from '../../logger.js';
@@ -10,6 +9,7 @@ import { MoreThan } from 'typeorm';
 import { Note } from '@/models/entities/note.js';
 import { Poll } from '@/models/entities/poll.js';
 import { DbUserJobData } from '@/queue/types.js';
+import { createTemp } from '@/misc/create-temp.js';
 
 const logger = queueLogger.createSubLogger('export-notes');
 
@@ -23,82 +23,81 @@ export async function exportNotes(job: Bull.Job<DbUserJobData>, done: any): Prom
 	}
 
 	// Create temp file
-	const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
-		tmp.file((e, path, fd, cleanup) => {
-			if (e) return rej(e);
-			res([path, cleanup]);
-		});
-	});
+	const [path, cleanup] = await createTemp();
 
 	logger.info(`Temp file is ${path}`);
 
-	const stream = fs.createWriteStream(path, { flags: 'a' });
+	try {
+		const stream = fs.createWriteStream(path, { flags: 'a' });
 
-	const write = (text: string): Promise<void> => {
-		return new Promise<void>((res, rej) => {
-			stream.write(text, err => {
-				if (err) {
-					logger.error(err);
-					rej(err);
-				} else {
-					res();
-				}
+		const write = (text: string): Promise<void> => {
+			return new Promise<void>((res, rej) => {
+				stream.write(text, err => {
+					if (err) {
+						logger.error(err);
+						rej(err);
+					} else {
+						res();
+					}
+				});
 			});
-		});
-	};
+		};
 
-	await write('[');
+		await write('[');
 
-	let exportedNotesCount = 0;
-	let cursor: Note['id'] | null = null;
+		let exportedNotesCount = 0;
+		let cursor: Note['id'] | null = null;
 
-	while (true) {
-		const notes = await Notes.find({
-			where: {
-				userId: user.id,
-				...(cursor ? { id: MoreThan(cursor) } : {}),
-			},
-			take: 100,
-			order: {
-				id: 1,
-			},
-		}) as Note[];
+		while (true) {
+			const notes = await Notes.find({
+				where: {
+					userId: user.id,
+					...(cursor ? { id: MoreThan(cursor) } : {}),
+				},
+				take: 100,
+				order: {
+					id: 1,
+				},
+			}) as Note[];
 
-		if (notes.length === 0) {
-			job.progress(100);
-			break;
-		}
-
-		cursor = notes[notes.length - 1].id;
-
-		for (const note of notes) {
-			let poll: Poll | undefined;
-			if (note.hasPoll) {
-				poll = await Polls.findOneByOrFail({ noteId: note.id });
+			if (notes.length === 0) {
+				job.progress(100);
+				break;
 			}
-			const content = JSON.stringify(serialize(note, poll));
-			const isFirst = exportedNotesCount === 0;
-			await write(isFirst ? content : ',\n' + content);
-			exportedNotesCount++;
+
+			cursor = notes[notes.length - 1].id;
+
+			for (const note of notes) {
+				let poll: Poll | undefined;
+				if (note.hasPoll) {
+					poll = await Polls.findOneByOrFail({ noteId: note.id });
+				}
+				const content = JSON.stringify(serialize(note, poll));
+				const isFirst = exportedNotesCount === 0;
+				await write(isFirst ? content : ',\n' + content);
+				exportedNotesCount++;
+			}
+
+			const total = await Notes.countBy({
+				userId: user.id,
+			});
+
+			job.progress(exportedNotesCount / total);
 		}
 
-		const total = await Notes.countBy({
-			userId: user.id,
-		});
+		await write(']');
 
-		job.progress(exportedNotesCount / total);
+		stream.end();
+		logger.succ(`Exported to: ${path}`);
+
+		const fileName = 'notes-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.json';
+		const driveFile = await addFile({ user, path, name: fileName, force: true });
+
+		logger.succ(`Exported to: ${driveFile.id}`);
+	} finally {
+		cleanup();
 	}
 
-	await write(']');
-
-	stream.end();
-	logger.succ(`Exported to: ${path}`);
-
-	const fileName = 'notes-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.json';
-	const driveFile = await addFile({ user, path, name: fileName, force: true });
-
-	logger.succ(`Exported to: ${driveFile.id}`);
-	cleanup();
 	done();
 }
 
diff --git a/packages/backend/src/queue/processors/db/export-user-lists.ts b/packages/backend/src/queue/processors/db/export-user-lists.ts
index 45852a603..71dd72df2 100644
--- a/packages/backend/src/queue/processors/db/export-user-lists.ts
+++ b/packages/backend/src/queue/processors/db/export-user-lists.ts
@@ -1,11 +1,11 @@
 import Bull from 'bull';
-import * as tmp from 'tmp';
 import * as fs from 'node:fs';
 
 import { queueLogger } from '../../logger.js';
 import { addFile } from '@/services/drive/add-file.js';
 import { format as dateFormat } from 'date-fns';
 import { getFullApAccount } from '@/misc/convert-host.js';
+import { createTemp } from '@/misc/create-temp.js';
 import { Users, UserLists, UserListJoinings } from '@/models/index.js';
 import { In } from 'typeorm';
 import { DbUserJobData } from '@/queue/types.js';
@@ -26,46 +26,45 @@ export async function exportUserLists(job: Bull.Job<DbUserJobData>, done: any):
 	});
 
 	// Create temp file
-	const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
-		tmp.file((e, path, fd, cleanup) => {
-			if (e) return rej(e);
-			res([path, cleanup]);
-		});
-	});
+	const [path, cleanup] = await createTemp();
 
 	logger.info(`Temp file is ${path}`);
 
-	const stream = fs.createWriteStream(path, { flags: 'a' });
+	try {
+		const stream = fs.createWriteStream(path, { flags: 'a' });
 
-	for (const list of lists) {
-		const joinings = await UserListJoinings.findBy({ userListId: list.id });
-		const users = await Users.findBy({
-			id: In(joinings.map(j => j.userId)),
-		});
-
-		for (const u of users) {
-			const acct = getFullApAccount(u.username, u.host);
-			const content = `${list.name},${acct}`;
-			await new Promise<void>((res, rej) => {
-				stream.write(content + '\n', err => {
-					if (err) {
-						logger.error(err);
-						rej(err);
-					} else {
-						res();
-					}
-				});
+		for (const list of lists) {
+			const joinings = await UserListJoinings.findBy({ userListId: list.id });
+			const users = await Users.findBy({
+				id: In(joinings.map(j => j.userId)),
 			});
+
+			for (const u of users) {
+				const acct = getFullApAccount(u.username, u.host);
+				const content = `${list.name},${acct}`;
+				await new Promise<void>((res, rej) => {
+					stream.write(content + '\n', err => {
+						if (err) {
+							logger.error(err);
+							rej(err);
+						} else {
+							res();
+						}
+					});
+				});
+			}
 		}
+
+		stream.end();
+		logger.succ(`Exported to: ${path}`);
+
+		const fileName = 'user-lists-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.csv';
+		const driveFile = await addFile({ user, path, name: fileName, force: true });
+
+		logger.succ(`Exported to: ${driveFile.id}`);
+	} finally {
+		cleanup();
 	}
 
-	stream.end();
-	logger.succ(`Exported to: ${path}`);
-
-	const fileName = 'user-lists-' + dateFormat(new Date(), 'yyyy-MM-dd-HH-mm-ss') + '.csv';
-	const driveFile = await addFile({ user, path, name: fileName, force: true });
-
-	logger.succ(`Exported to: ${driveFile.id}`);
-	cleanup();
 	done();
 }
diff --git a/packages/backend/src/queue/processors/db/import-custom-emojis.ts b/packages/backend/src/queue/processors/db/import-custom-emojis.ts
index 28e0b867a..64dfe8537 100644
--- a/packages/backend/src/queue/processors/db/import-custom-emojis.ts
+++ b/packages/backend/src/queue/processors/db/import-custom-emojis.ts
@@ -1,9 +1,9 @@
 import Bull from 'bull';
-import * as tmp from 'tmp';
 import * as fs from 'node:fs';
 import unzipper from 'unzipper';
 
 import { queueLogger } from '../../logger.js';
+import { createTempDir } from '@/misc/create-temp.js';
 import { downloadUrl } from '@/misc/download-url.js';
 import { DriveFiles, Emojis } from '@/models/index.js';
 import { DbUserImportJobData } from '@/queue/types.js';
@@ -25,13 +25,7 @@ export async function importCustomEmojis(job: Bull.Job<DbUserImportJobData>, don
 		return;
 	}
 
-	// Create temp dir
-	const [path, cleanup] = await new Promise<[string, () => void]>((res, rej) => {
-		tmp.dir((e, path, cleanup) => {
-			if (e) return rej(e);
-			res([path, cleanup]);
-		});
-	});
+	const [path, cleanup] = await createTempDir();
 
 	logger.info(`Temp dir is ${path}`);
 
diff --git a/packages/backend/src/server/file/send-drive-file.ts b/packages/backend/src/server/file/send-drive-file.ts
index 027d078ce..c34e04314 100644
--- a/packages/backend/src/server/file/send-drive-file.ts
+++ b/packages/backend/src/server/file/send-drive-file.ts
@@ -4,11 +4,11 @@ import { dirname } from 'node:path';
 import Koa from 'koa';
 import send from 'koa-send';
 import rename from 'rename';
-import * as tmp from 'tmp';
 import { serverLogger } from '../index.js';
 import { contentDisposition } from '@/misc/content-disposition.js';
 import { DriveFiles } from '@/models/index.js';
 import { InternalStorage } from '@/services/drive/internal-storage.js';
+import { createTemp } from '@/misc/create-temp.js';
 import { downloadUrl } from '@/misc/download-url.js';
 import { detectType } from '@/misc/get-file-info.js';
 import { convertToWebp, convertToJpeg, convertToPng } from '@/services/drive/image-processor.js';
@@ -50,12 +50,7 @@ export default async function(ctx: Koa.Context) {
 
 	if (!file.storedInternal) {
 		if (file.isLink && file.uri) {	// 期限切れリモートファイル
-			const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
-				tmp.file((e, path, fd, cleanup) => {
-					if (e) return rej(e);
-					res([path, cleanup]);
-				});
-			});
+			const [path, cleanup] = await createTemp();
 
 			try {
 				await downloadUrl(file.uri, path);
diff --git a/packages/backend/src/server/index.ts b/packages/backend/src/server/index.ts
index cd061da72..f31de2b7f 100644
--- a/packages/backend/src/server/index.ts
+++ b/packages/backend/src/server/index.ts
@@ -89,10 +89,10 @@ router.get('/avatar/@:acct', async ctx => {
 });
 
 router.get('/identicon/:x', async ctx => {
-	const [temp] = await createTemp();
+	const [temp, cleanup] = await createTemp();
 	await genIdenticon(ctx.params.x, fs.createWriteStream(temp));
 	ctx.set('Content-Type', 'image/png');
-	ctx.body = fs.createReadStream(temp);
+	ctx.body = fs.createReadStream(temp).on('close', () => cleanup());
 });
 
 router.get('/verify-email/:code', async ctx => {
diff --git a/packages/backend/src/services/drive/generate-video-thumbnail.ts b/packages/backend/src/services/drive/generate-video-thumbnail.ts
index ef75a9f58..ca12ab8d3 100644
--- a/packages/backend/src/services/drive/generate-video-thumbnail.ts
+++ b/packages/backend/src/services/drive/generate-video-thumbnail.ts
@@ -1,38 +1,31 @@
 import * as fs from 'node:fs';
-import * as tmp from 'tmp';
+import * as path from 'node:path';
+import { createTemp } from '@/misc/create-temp.js';
 import { IImage, convertToJpeg } from './image-processor.js';
 import FFmpeg from 'fluent-ffmpeg';
 
-export async function GenerateVideoThumbnail(path: string): Promise<IImage> {
-	const [outDir, cleanup] = await new Promise<[string, any]>((res, rej) => {
-		tmp.dir((e, path, cleanup) => {
-			if (e) return rej(e);
-			res([path, cleanup]);
+export async function GenerateVideoThumbnail(source: string): Promise<IImage> {
+	const [file, cleanup] = await createTemp();
+	const parsed = path.parse(file);
+
+	try {
+		await new Promise((res, rej) => {
+			FFmpeg({
+				source,
+			})
+			.on('end', res)
+			.on('error', rej)
+			.screenshot({
+				folder: parsed.dir,
+				filename: parsed.base,
+				count: 1,
+				timestamps: ['5%'],
+			});
 		});
-	});
 
-	await new Promise((res, rej) => {
-		FFmpeg({
-			source: path,
-		})
-		.on('end', res)
-		.on('error', rej)
-		.screenshot({
-			folder: outDir,
-			filename: 'output.png',
-			count: 1,
-			timestamps: ['5%'],
-		});
-	});
-
-	const outPath = `${outDir}/output.png`;
-
-	// JPEGに変換 (Webpでもいいが、MastodonはWebpをサポートせず表示できなくなる)
-	const thumbnail = await convertToJpeg(outPath, 498, 280);
-
-	// cleanup
-	await fs.promises.unlink(outPath);
-	cleanup();
-
-	return thumbnail;
+		// JPEGに変換 (Webpでもいいが、MastodonはWebpをサポートせず表示できなくなる)
+		return await convertToJpeg(498, 280);
+	} finally {
+		cleanup();
+	}
 }
diff --git a/packages/backend/src/services/drive/upload-from-url.ts b/packages/backend/src/services/drive/upload-from-url.ts
index 79b1b8c2e..001fc49ee 100644
--- a/packages/backend/src/services/drive/upload-from-url.ts
+++ b/packages/backend/src/services/drive/upload-from-url.ts
@@ -45,29 +45,20 @@ export async function uploadFromUrl({
 	// Create temp file
 	const [path, cleanup] = await createTemp();
 
-	// write content at URL to temp file
-	await downloadUrl(url, path);
-
-	let driveFile: DriveFile;
-	let error;
-
 	try {
-		driveFile = await addFile({ user, path, name, comment, folderId, force, isLink, url, uri, sensitive });
+		// write content at URL to temp file
+		await downloadUrl(url, path);
+
+		const driveFile = await addFile({ user, path, name, comment, folderId, force, isLink, url, uri, sensitive });
 		logger.succ(`Got: ${driveFile.id}`);
+		return driveFile!;
 	} catch (e) {
-		error = e;
 		logger.error(`Failed to create drive file: ${e}`, {
 			url: url,
 			e: e,
 		});
-	}
-
-	// clean-up
-	cleanup();
-
-	if (error) {
-		throw error;
-	} else {
-		return driveFile!;
+		throw e;
+	} finally {
+		cleanup();
 	}
 }