Send works on mobile browsers (both iOS and Android) so you can upload and share files on the go. That said, there are some real-world limits:
✅ Small files (photos, PDFs, quick docs) usually upload fine
❌ Large or slow uploads may not complete reliably
Why uploads can fail on mobile
Mobile browsers aren’t great at staying “awake” during long uploads. Common issues include:
Background tab unloading: Your phone might pause the upload if you switch apps or lock your screen
Upload timeouts: Some mobile browsers cut the connection if things take too long
Battery or memory limits: Your device may kill the upload to save resources
Network switching: Moving between Wi-Fi and data mid-upload can interrupt the process
What we recommend
For transfers over 1 GB (or anything with 20+ files) use desktop if you can. You’ll get:
More stable upload performance
Faster completion times
Fewer interruptions
Tips if you have to use mobile
If desktop’s not an option:
Keep your screen active while uploading
Avoid switching apps or locking your phone
Stick to smaller transfers (under ~500 MB for best results)
We’re working on ways to improve mobile stability in future versions.