Guide · Large files
Share a large file without uploading it first.
A direct transfer can save the waiting and storage step of a cloud host, but a multi-gigabyte session still needs enough time, disk space, power, and stable bandwidth.
Check both devices
Confirm that the sender can read the original file and the recipient has more free disk space than the file requires. For multi-gigabyte transfers, desktop browsers are usually more reliable than mobile browsers because they can stream to a selected file and are less likely to suspend in the background.
Estimate the real transfer time
The sender's upload speed is often the limiting factor. A 10 GB file at a stable 20 Mbps upload takes roughly 70 minutes before overhead, which is longer than Dropfile's one-hour join window. The transfer may finish after expiry if it started in time, but both devices must remain connected.
Choose the right mode
Use one-person mode when only one recipient needs the file and you want the simplest path. Use multi-download mode for several recipients; peers can exchange verified pieces, but every participant still shares finite upload and download capacity.
Prevent interruptions
Connect laptops to power, disable sleep temporarily, keep mobile browsers in the foreground, and avoid changing networks mid-transfer. Wired Ethernet or strong 5 GHz/6 GHz Wi-Fi reduces stalls. Keep the original file in place until every recipient confirms completion.
Recover from failure
Dropfile does not currently provide resumable cloud sessions. If a transfer stops, create a fresh link and restart. Repeated failures on the same network usually indicate a browser storage limit, security software, VPN policy, or blocked WebRTC path.