Yes that's why I use it. I never move the files only copy them. If I delete one on the phone and need it back then I copy it from the computer back to the phone. Never move. I also like it because I can select the individual files I want to copy. It would be great if this works between phones. If you get a chance let us know the results.
The Samsung Note 10 Plus and Note 9 probably has the capability to do it without transferring to a desktop, then sending to the Note 9. My old desktop will not accept Samsung drivers to do it. Samsung doesn't have any detailed instructions of some of it potential. Appreciate your advice and feedback
Just found how to activate the feature to move, copy, share the music files. Limit of 500 files at one time. Will try moving them by USB- c cable connecting them together. Will try later on today.
In your Galaxy 9 box there should've been a small cube looking object with an USB type c connector coming out the end of it. This is a USB type c male to USB female adapter. Using this and a flashdrive you can use your phone itself to transfer files to the drive. No need for a computer or any external device save the flashdrive. This would work for both devices.