[Feature request] Allow option to use external secondary storage (sd-card etc)

[nain-F49FF806]

Describe what you'd like to see added to the app

Currently, Anemo uses internal private storage. This is very useful to keep files private from mediastore and other apps with storage access peeking around.

One limitation of this choice is that it isn't taking advantage of expandable storage (like SD-cards). Internal storage is limited, and can fill up easily.

With Android 11, app specific directories on external storage are also private to the app. Inaccessible to other apps, including those with general write access. [ref: android-11-privacy]

It would be useful to have an option in Anemo to use this external storage. Either multiple Anemo providers, or option to select between internal memory and secondary storage.

Additional information

No response