rolinger opened a new issue, #599:
URL: https://github.com/apache/cordova-plugin-file/issues/599
# Bug Report
1. My app has been using `cordova.file.externalRootDirectory +
"Download/MyAppDir"` to write files since Android 9 or 10 and it has all
worked, but now suddenly on Android 13 it has stopped when a device was
migrated from Device A to Device B. Device A was a busted phone, and all the
content/apps/folders, etc was migrated to the new Device B.
```
cordova.file.externalRootDirectory = file:///storage/emulated/0/
Images/
Documents/
Download/
MyAppDir/ (if not exist, create)
aFiles/ (if not exist, create)
a-hello.doc (file downloaded from app)
a-goodbye.pdf (file downloaded from app)
a-presentation.ppt (file downloaded from app)
...
bFiles/ (if not exist, create)
b-hello.doc (file downloaded from app)
b-goodbye.pdf (file downloaded from app)
b-presentation.ppt (file downloaded from app)
...
cFiles/
.....
```
Via the UIs `File Manager` app, you can browse to the `Downloads` folder and
then into the `MyAppDir` folder and can access sub-folders and all the
downloaded files. This is the case before and after the migration - all is
good so far.
But after the migration to Device B, my app can no longer download to the
`MyAppDir` folder or any of its subfolders. My app was receiving a `permission
denied` error
So I start troubleshooting thinking maybe Android 13 now requires
permissions to access this area. And after multiple fruitless tests, I deleted
one of the sub-folders (`aFiles`)...then in my app tried to download a file
that would need the `aFiles` folder. The app successfully created a new
`aFiles` folder AND successfully downloaded the file again.
I ran this test multiple times across the other various sub-folders and was
able to replicate it problem every time. `permission denied` - then I deleted
to the folder, tried the download again, it recreated the folder and
successfully downloaded the file. My app created all these folders, why
couldn't my app access them again until after I deleted them and redownloaded?
Even more odd though...is I only had to delete the `MyAppDir` subfolders to get
this to work. I didn't have to delete the main `MyAppDir` folder at all.
I can't have users deleting folders and redownloading content again. I
think during the upgrade or migrating the phone the device somehow lost the
reference that those folders were created by my app and thus wouldn't allow me
to download to them again. When manually deleting them and then recreating
them, its like the association was restored and new permissions were granted.
**How can I account for such issues?**
On a side note:
What directory does `cordova.file.externalDataDirectory` actually write to?
I can download files and write to it with no problem, there no permissions
issues. But then on the users phone, via FileManager, you can't find the file
anywhere...where is it being written to and how can the users "File" app locate
the downloaded file?
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