Proton Drive's Desktop Version: First Impressions

This is a companion discussion topic for the original entry at

Proton Desktop and the Synology BeeDrive have been the main reason I built a dedicated Windows x86 PC, just for backups and using proton drive.

is it possible to use ssh, secure ftp or maybe even Filezilla with Proton Drive? Is it possible to take one large file and compress it into smaller multiple zip file sizes then do a serial upload? i.e. 4Gb single file → 200Mb x20 files.