>>963
Are you synced with the PTR? That makes your four client.db files about 40-50GB now. The internal backup is basically just a copy of your 'install_dir/db' folder, which is:

The four client*.db files.
256 'fxx' file folders under 'client_files' folder
256 'txx' thumbnail folders under 'client_files' folder

>>974
Not much yet. Everything at the moment is here:

https://hydrusnetwork.github.io/hydrus/help/client_api.html

You can queue up URLs for download and fetch simple searches back, and files/thumbnails.

I hope to keep expanding it, including eventual full session control so you can make new pages and so on.

>>977