DroidFS does not have Internet permission so any data exfiltration is prevented at the OS level.

F-Droid is like package maintainers for Linux distributions. You have to trust them if you want to use their pre-built binary. However, some app builds are reproducible. Check the doc for more info.

DroidFS can open existing volumes. Just click on the “+” button in the bottom right corner, then on the folder icon, and then select the volume directory.

To type with only one finger, there’s 8Vim.