When you format it as "Internal" storage it should still allow for files to be moved to it. How exactly are you trying to move them?
Well the phone won't see it as a separate SD card now. To that is likely why the phone's file manager doesn't see it that way.
You could try either a different file managing app, or connect it to a computer via USB cord and move files that way. Either of these should work, unless the manufacturer or carrier/service provider made alterations to the way the device allows things. That would be the only way it could not allow moving of files. Unless, of course, there is no available space on the card now. Which can easily happen when you move apps.
But you have to remember that the SD card is now considered "Internal" storage.
So anything you move, is still going to show as "Internal" and not the original "External". I think that is something that confuses a lot of people. It just isn't seen the same anymore.
Hmm i got it Thank you for taking the time to help and explain it! 😀Well, when you make the card "Internal" storage, so you can run apps on it, as most won't run on it as "External" storage, then moving the files is really of no use. Both are being used as "Internal" storage.
Now if you aren't going to want the space to run apps from the card, then I would suggest leaving the SD card as "External" storage. Then you can put anything on it, other than the apps.
There are also benefits to both. In the case of making it "Internal" that makes the card encoded so no other device can access it/read it. However, there is then a drawback to that. If the dies then you lose all that is on that card. Additionally if you reset the phone, then you would also loose access to the card.
Leaving it as "External" would prevent this, but then the card could be read by any device.
So you just have to decide what you want.