PsiDriveThe plaintext file remains on the sending device while encrypted chunks are prepared.
Prepare the connection, protect the link, and let encryption finish.
PsiDrive's guest interface displays an allowance of up to 1 GB per rolling 24 hours. The exact available amount shown in the product is authoritative because previous guest transfers count toward that rolling quota.
Before uploading.
- Confirm the selected file and displayed available quota before starting.
- Use stable Wi-Fi or another reliable connection and keep the sending tab active.
- Prevent the device from sleeping during a long upload.
- Decide whether the transfer should expire normally or delete after the first successful download.
What happens to a large file.
The client splits the file into chunks, encrypts each chunk using authenticated encryption, and uploads ciphertext through short-lived signed storage URLs. This avoids pushing the complete large file through the API Worker while retaining quota, finalization, expiry, and access controls in application metadata.
Encrypted chunks go directly to private object storage using limited signed requests.
The transfer link is shown only after the API confirms the upload metadata is ready.
Help the recipient succeed.
Send the complete link through a private channel and tell the recipient the approximate file size so they can choose a device with enough free space. Current Chrome and Edge offer the most memory-efficient direct-to-disk web path; supported alternatives may use a browser fallback.
PsiDrive is a temporary transfer service, not permanent cloud backup. Keep your own source copy until the recipient confirms a successful, intact download.