Backing up massive datasets on remote Debian servers introduces two major hurdles: resource constraints and connection stability. A dropped SSH session during a multi-hour compression task means starting over. This guide details using 7-Zip for multi-volume archives and GNU Screen to protect long-running processes from disconnections.

The core solution is GNU Screen, a terminal multiplexer that creates persistent sessions surviving network drops. Install it alongside 7-Zip, then launch a dedicated session before starting your backup. You can detach from the session with a keystroke, letting the server continue working while you close your local terminal.

For the compression itself, specific 7-Zip flags manage RAM and CPU usage to prevent server crashes. Parameters like `-v1g` split the archive into 1GB chunks for stable transfers, while `-mx=1` and `-md=16m` prioritize speed and low memory. The `-p` and `-mhe=on` options add encryption for security.

After completion, verify the archive integrity with a test command. Clients need all split files and 7-Zip to extract the full dataset. This approach is standard for DevOps handling large-scale data migration or offsite backups on constrained infrastructure.