My Upload Is Stuck or Failed
Why uploads fail, what Vandall retries automatically, and when you need to retry manually.
In short
- Let automatic retry finish — uploads continue in the background on mobile.
- Supported formats: WAV, FLAC, MP3, AIFF (audio); PNG, JPG (artwork); PDF (docs).
- Wi-Fi beats cellular for multi-file uploads.
- 1
Let the automatic retry finish first
Vandall retries failed chunks automatically when the connection drops. On mobile the upload continues in the background — closing the app doesn't cancel it. Give it a few minutes on slower connections before assuming it's stuck.
- 2
Check the file format and size
Supported formats are WAV, FLAC, MP3, and AIFF for audio; PNG and JPG for cover art; PDF for documents. A file in an unsupported codec (like M4A lossless) or an artwork file over the limit fails silently. Re-encode before retrying.
- 3
Switch to Wi-Fi for large files
A 24-bit 48kHz stereo WAV of a 4-minute song is roughly 70MB. Multiple files over cellular is where uploads most often fail. If four stems are stuck, switching to Wi-Fi and re-selecting them almost always resolves it.
- 4
Retry the specific file that failed
Other files in the same batch that already succeeded stay uploaded — you only re-select what didn't land. Use the file list's status indicator to see which files still need to transfer.
- 5
When to contact support
If the same file fails three times on a stable connection, send support the file, the project name, and the device/OS. That's rare — almost all stuck uploads are connection or format issues.
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