Have you tried performing a factory reset yet? If not then give it a try, rescan the music (Android mode and Mango mode have to be done separately), and see if that helps.
Regarding not being recognized as a USB storage device - see page 18 of the owners manual for instructions on how to set the DX220 for various modes when connected. There is a link to the manual on the first post of this thread or you can go directly to iBasso's website and find it there.
I know this does not answer all of your questions but might get you going...
Let me know how it goes or if you have already tried these things and maybe the collective here can help.
Cheers,
Tim
I did as you said and it didn't work. Paul@ibasso told me he uses a MBP and AFT and it works. So Tried to attach to my MBP and it didn't work. Here's a transcription of what Happened next. Thank you for your help, making progress!
My reply to Paul:
Thank you for your reply. I tried a Factory reset, as another user suggested and didn't work. However when I saw your message, and you said you use AFT with a MBP, I was encouraged. I tried again on my 2016 MBP, and the DX220 was not found. So again because you told me it works; I came to my wife's computer, a 2011 MBP. And voila it worked. AFT saw the internal storage of the Ibasso, and to test, I transferred some albums and music videos, and both play. I kept having problems because the DX would lock. when i unlocked it it worked. I couldn't see my SD Card? But in the AFT window I saw the "internal storage" at the top left, and the work Ibasso next to it, when I clicked on the Ibasso, it seemed to bring up a listing of my SD Card library. Back on the DX, I scanned the internal storage and can access the music and videos. SO BIG Progress! My SD card access in android is not working.
A few questions:
From your viewpoint is the best way to get music on the DX, AFT and just drag and drop?
What do I D&D, to have iTunes functionality like Album Art etc.
IN the AFT window, how should I be able to see the SD Card?
If the Manago OS sees my files, should I assume, Dapper transferred them OK, and Android Mango should be able to see them?
I travel with my job and won't be back 'till Thursday night. So I will read and work with what I have a see how much more progress I can make. I will read the manual, i printed it. I will reach out to you with Questions I can't answer, Thank you.