>it makes sense to let the users give it access to all the files on the phone
It doesn't even pretend to be a backup app, and further the permission we're talking about is limited to external storage (though that is a nebulous term on many Android devices where internal storage is split-brained on being internal and partly external).
Further saying "let the user decide" works great in theory and with a considered, rational userbase. In reality it means that everyone just says sure to everything, and soon all of the user's data is exfiltrated and everyone is whining that Google/Apple/et al should have forseen this.
I'm sure they would happily allow you to select the folders you want to give permissions to, but I think that's not possible anymore.
So if you want to sync a local data folder that stores, for example, the tracks you record with your GPS, you cannot do it without full access unless your GPS app allows you to select a shared folder to store its data.
0: https://developer.android.com/about/versions/11/privacy/storage
1: https://www.theregister.com/2025/05/13/nextcloud_play_store_complaint/
SAF provides both provider and consumer APIs, and from the language NextCloud uses, I get the feeling they might've missed the consumer API here. Had NextCloud said "we want the user to be able to select the Download folder and certain external media directories" then I would've thought the restrictions are the main problem, but that doesn't seem to be the case here.
I went through the same with Syncthing, and now I install it from out of Google Play, where it doesn't need Google approval to do the All Files Permission API call.
I understand why the API changes and the hardening of the Android system, but it's also true you're locked out from certain folders even when on developer mode and it feels weird.
It is correct that you cannot access private app folders, meaning stuff like /data/data, /Android/data, /Android/obb. But this is nothing new and you basically need a rooted device to access them. You can however access anything on external storage, which is typically where apps would store data you would want to sync and which would cover by far most use cases from users. At the moment, users are mostly complaining that only media files are synced, but not documents. SAF would solve this.
> I'm sure they would happily allow you to select the folders you want to give permissions to, but I think that's not possible anymore.
That is absolutely possible:
https://developer.android.com/training/data-storage/shared/d...
So, following a bit the example I was giving, if you want to sync data from another app to backup it (or whatever), and that App stores its data in the default data folder assigned by Android, since Android 11 it's going to be very difficult to do it.
I used to sync some of those folders with Syncthing in Android, and since Android 11 things have gotten complicated (meaning, you need 'all files' access, and even then, some things might not be accessible). [0]
0: https://forum.syncthing.net/t/android-11-and-syncthing-what-can-be-synchronised/17100/2You can select any file you could before on shared external storage. You can't select private app directories which were always off limits from other apps just like on iOS.
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[0] On Android 11 (API level 30) and higher, you cannot use the ACTION_OPEN_DOCUMENT_TREE intent action to request access to the following directories:
- The root directory of the internal storage volume.
- The root directory of each SD card volume that the device manufacturer considers to be reliable, regardless of whether the card is emulated or removable. A reliable volume is one that an app can successfully access most of the time.
- The Download directory.
Furthermore, on Android 11 (API level 30) and higher, you cannot use the ACTION_OPEN_DOCUMENT_TREE intent action to request that the user select individual files from the following directories:
- The Android/data/ directory and all subdirectories.
- The Android/obb/ directory and all subdirectories.
[1] On Android 11 (API level 30) and higher, you cannot use the ACTION_OPEN_DOCUMENT intent action to request that the user select individual files from the following directories:
- The Android/data/ directory and all subdirectories.
- The Android/obb/ directory and all subdirectories.
0: https://developer.android.com/training/data-storage/shared/documents-files#document-tree-access-restrictions
1: https://developer.android.com/training/data-storage/shared/documents-files#document-access-restrictions
edit: fixed readability and a link
I see your point, but why isn't this the case for document management apps? Also, Nextcloud can be extended with plugins, some of them falling in the document management category.
> Further saying "let the user decide" works great in theory and with a considered, rational userbase.
Nextcloud is mostly used by people that like to self-host their services, so in this case we fall into the rational userbase category.
https://play.google.com/store/apps/details?id=com.simplemobi... or on github.
https://www.androidauthority.com/simple-mobile-tools-acquisi...
Use the Fossify fork instead:
https://play.google.com/store/apps/details?id=org.fossify.ga...