As you mentioned that there was folder of "Adobe Acrobat" which is not there in your device anymore.
Could you please help me understanding is it was a folder you were able to see in the application (Adobe Acrobat) itself or was an icon on the home screen named "Adobe Acrobat" ?
The reason I am asking this question, because Adobe Acrobat does not create any specific folder in the device to save the files (unless you do it manually)
It saves the files in the applications itself (until you dont save or share to a different location)
As you are able to see the files on the homepage, then it must be saved any one of the location location under-
- Document cloud
- Or creative cloud
After I installed the Reader the first time, I edited a document and wondered where it would be saved. After searching I found the folder named Adobe Acrobat and all the documents were saved with the same name as before and a number f.e. ...(1) behind it. After I changed the location for saving from the local storage to the SD-Card, the documents didn't appear in the folder below any more.
I searched in all the folders you mentioned in your answer, but I didn't find anything. For me it's difficult to explain but the settings say the cache storage location for the document cloud is on the tablet and not on the card...
But there's nothing in the document cloud either...
Thanks for your answer!