thank you very much for the suggestion and help, perhaps I should explain from the begiining what I am trying to do (and what IS working below Andoid 11)
First, the Canvas (a signature) sould be saved:
When all is finished, the signature should be uploaded to my server:
As mentioned, this is working on all devices below Android 11 (SDK < 29)
Now the problem is, that when SDK 30 was hiiting, this solution does not work anymore.
So the question is, how can this be adapted to work on both (below 30 AND with sdk 30)
I tried to SAVE in the ASD, which is working, but I can NOT UPLOAD it from there, for this reason I thought I would work when I move the file outside from the ASD to another folder, but this does also not work.
So, how can my png file be uploaded DIRECTLY from the ASD ?