Xperia X, how do I mount the filesystem on my Linux box

[nephros]

There is a project collecting torrents for older releases out there. That might help.

See:

Download older version of SailfishOS

I have just started a repository on GitHub providing torrent files for Sailfish OS releases. I added the actual ones (4.0.1.48) for later use and all previous I still had. If you have older releases for your device not available in this repo, you are all welcome to contribute!