--- title: Upload failed type: troubleshooting section: drive summary: Every upload failure names a message and a recommended action. This page groups the messages by cause and says which ones are worth retrying. sources: - evolve-front-end/lib/content-registry/upload-error-catalog.ts - evolve-front-end/lib/content-registry/upload-error.ts - evolve-front-end/components/content-platform/content-platform-upload-panel.tsx - evolve-front-end/app/i18n/locales/en/content-platform.json verified: at: 2026-09-04 env: code by: content-lane-drive ttl_days: 45 related: [drive/upload-a-file, drive/accepted-file-types, drive/upload-a-site] --- A failed row in the upload queue carries the reason and a recommended action beneath it. Do what that action says first. **Try again** on the row retries a single file; **Details** shows the error code, the HTTP status and a reference identifier to quote if you need help. ## The file itself is not accepted | Message | What to do | | --- | --- | | **This file type is not supported here. Choose a supported format.** | Check [Accepted file types](/help/drive/accepted-file-types) and convert the file. | | **The file type does not match its extension.** | The contents are not what the extension claims. Re-export the file. | | **This file is too large for the current upload limit.** | Split the file or ask an administrator about the limit. | | **This file exceeds the available upload limit.** | The destination is out of room. Remove files or choose another destination. | | **We could not start this upload. Please select the file again.** | Pick the file again; the selection went stale. | None of these are worth retrying unchanged. ## You are not allowed to upload here | Message | What to do | | --- | --- | | **You do not have permission to upload to this location.** | You hold read access on the destination. Ask its owner for **Can edit**. | | **Your session has expired. Please sign in again.** | Start a new session, then upload again. | | **Your session could not be verified for this upload.** | The same: start a new session. | ## The destination is wrong or gone | Message | What to do | | --- | --- | | **The upload destination could not be found.** | Reload Drive; the folder may have been renamed or deleted. | | **This destination is unavailable. Choose another location.** | Pick a different destination in **Save to**. | | **This upload is already in progress or has changed. Refresh and try again.** | Reload before retrying, or the same file lands twice. | | **The upload expired. Please start it again.** | Queue the file again from the beginning. | | **My Drive is still being prepared. Please try again in a moment.** | Wait a moment. Drive is provisioning your personal container. | | **My Drive is unavailable. Please refresh and try again.** | Reload the page. | ## The transfer broke These are worth retrying as-is: - **The file transfer was interrupted.** - **The upload completed, but we could not confirm the file.** - **The file transfer finished, but the upload could not be finalized.** - **We could not start this upload. Please try again.** - **The uploaded file could not be verified. Please try again.** - **The upload service took too long to respond.** - **The upload service returned an unexpected response.** A large upload keeps its progress across a reload, so a retry after an interruption resumes rather than restarting. **This queue item cannot be retried after the panel was reloaded.** means that particular row lost its session: queue the file again. ## Security checks | Message | What it means | | --- | --- | | **Security checks are still running.** | Nothing is wrong. The file is held until the scan finishes. | | **This file was blocked by a security check.** | The file will not be admitted. Do not retry it. | | **Security checking is temporarily unavailable. Please try again later.** | Retry later. | ## Processing after the upload **The file uploaded, but preview or search processing could not be completed.** means the file is in Drive and usable, but has no preview or extracted text. Retry later; the row offers **Inspect item** to open it as it stands. **Preview and search processing cannot be retried right now.** means the retry is unavailable for the moment. ## The service is down **The upload service is temporarily unavailable.**, **Your session could not be confirmed. Please try again later.** and **The list of supported file types is unavailable. Please try again later.** all point at a service rather than your file. Try again later; nothing was uploaded. ## Before the upload even starts | Message | Cause | | --- | --- | | **Too many files selected. Upload up to 1,000 files at a time.** | More than 1,000 files. Split the batch. | | **Some files are not supported here.** | At least one dropped file is not in the catalogue. | | **The selected folder could not be opened.** | The browser refused the directory picker. Drag the folder in instead. | | **Upload file types are still loading. Please try again in a moment.** | The catalogue has not arrived. Wait a second. | | **Choose a WebVTT (.vtt) captions file.** | The captions file is not `.vtt`. | | **Caption files must be smaller than 10 MB.** | The captions file is over the limit. | ## Related - Open **Details** on the row and quote the reference identifier when you ask for help. - Retry one file rather than the batch: a single **Try again** avoids re-uploading everything. - If a whole batch fails the same way, the cause is the destination or your access, not the files. - For a site bundle rejected before upload, see [Upload a site](/help/drive/upload-a-site).