Hi @Sonam Latsho,
Welcome to Box Community, and we’ll help in finding your missing files!
If the files were already uploaded to Box.com from your old iPhone 5s, they should show up automatically on the new phone when you sign in to the same Box account. Box files live in the cloud, not only on the phone.
Here are the things you need to confirm:
- Make sure to sign in with the exact same Box account you used on the old phone.
- In the Box app, look in All Files and your usual folders.
- If the files were only saved locally on the old iPhone and were never uploaded to Box, they will not appear automatically on the new phone.
- If you still have access to the old phone, you may be able to recover the files from the device itself or from an iCloud/Finder/iTunes backup, then upload them to Box.
- If the old phone is no longer accessible and the files were never synced to Box or backed up elsewhere, Box likely cannot restore them.
Hope it helps! Let us know if you need additional assistance.