I want to store files on my server to avoid google cloud and other services.
I’m looking for FOSS software.
I want all the files to be encrypted client side with a masterpassword via an app or a web interface, the server must not have access to them.
An included android app for uploading and downloading would be nice.
I guess what I’m looking for is some kind of FTP server?
You could use software like Cryptomator and upload it to a Nextcloud.
Because Nextcloud is way more than just a file vault, you may want to use something more lightweight, like Pydio or Seafile.