Update TROUBLESHOOTING.md

add DocumentsUI, reformat

TROUBLESHOOTING.md

@@ -4,43 +4,57 @@ only collecting what comes along when supporting users...
 
 ### tar: chdir '/data/user/0/a.package.name': no such file or directory
 
-    => set Magisk option "Mount Namespace Mode" to global
+=> set Magisk option "Mount Namespace Mode" to global
 
-    - may be a thing on Android 13 (or 12+ or even 11 ?)
-    - on Android 10, it seems that "inherited" works, at least it does for me
-    - with "inherited" it may be that some apps work and others don't
+- may be a thing on Android 13 (or 12+ or even 11 ?)
+- on Android 10, it seems that "inherited" works, at least it does for me
+- with "inherited" it may be that some apps work and others don't
 
 ### backups are not visible (all or only some of them)
 
-    NB "seeing" a backup means, it finds a valid xxx.properties file for the backup.
+=> NB "seeing" a backup means, it finds a valid xxx.properties file for the backup.
 
-    So for backups that are not seen, first check the properties file.
+So for backups that are not seen, first check the properties file.
 
-    It's in json format. It should start with a { and end with }
+It's in json format. It should start with a { and end with }
 
-    One obvious reason could be lack of storage, e.g. the properties files are not there or they are zero length.
+One obvious reason could be lack of storage,
+e.g. the properties files are not there or they are zero length.
 
-    Basically the files could also be inaccessible, e.g. read protected, or owned by the wrong user.
+Basically the files could also be inaccessible,
+e.g. read protected, or owned by the wrong user.
 
 ### Firefox: "couldn't update permission for data"
 
-    - restore Firefox apk and data from OAndBackupX. Ignore the error.
-    - force-close Firefox
-    - delete the lock file (/data/data/[package.name]/files/mozilla/[profile.id].default/lock).
-    - start Firefox
+- restore Firefox apk and data from OAndBackupX. Ignore the error.
+- force-close Firefox
+- delete the lock file (/data/data/[package.name]/files/mozilla/[profile.id].default/lock).
+- start Firefox
 
 ### "install failed verification"
 
-    => Disable verify apps over USB   [x]
+=> Disable verify apps over USB   [x]
 
 ### *.properties files are zero size, but corresponding archives are created
 
-    => it seems ANExplorer replaced DocumentsUI and doesn't work
+=> it seems ANExplorer replaced DocumentsUI and doesn't work
 
-    this is not really proofed and it doesn't feel logical,
-    but using DocumentsUI again worked, which also means reselecting the backup directory,
-    it is possible that the permission got lost.
-    However, if access is not working, no file would have been created.
-    Though, ANExplorer seems to be the provider for the storage and this means it is at least
-    between a request and the execution by the system.
-    Perhaps text files are handled differently and don't work.
+this is not really proofed and it doesn't feel logical,
+but using DocumentsUI again worked, which also means reselecting the backup directory,
+it is possible that the permission got lost.
+
+However, if access is not working, no file would have been created.
+
+Though, ANExplorer seems to be the provider for the storage and this means it is at least
+between a request and the execution by the system.
+
+Perhaps text files are handled differently and don't work.
+
+### I cannot select a backup directory
+
+=> DocumentsUI a.k.a. Files app is used/necessary to grant access to the folder via SAF
+
+* there seem to be ROMs that remove DocumentsUI or maybe you did it manually
+  ("debloating" apps, you didn't know => not everything you don't know is "bloat")
+* at some point there also was a Magisk module for MiXplorer that removed DocumentsUI.
+* ANExplorer also seems to mess with it.