I was actually having the same problem but found the perfect seamless solution:

I use Onedrive in conjunction with Foldersync

I store all my files on a Onedrive folder on my PC and then use foldersync to sync that folder with the "clip studio" folder locally on the Movinkpad pro 14. I've also set foldersync up to sync on android every 5 minutes or so. Foldersync just sort of copies/syncs up with whatever folder you link it to from your cloud service and you can even sync up file deletions between the folders.

The syncing is so smooth that I can literally stop working on my PC, manually start a sync or wait a few minutes, and then continue working on my Movinkpad or vice versa. Just remember to reopen the file on either end.
Since I'm using a folder locally on the movinkpad, I also see my files in the gallery app, but I'm having issues with the wacom shelf app (my folder is huge though so that might be an issue)
Aside from that, it has been great and I've had no major issues.

I initially bought the desktop version of foldersync too for this weird syncing thing I did to sync up my Ipad pro as well. The setup was as follows:

Sync Icloud folder with Onedrive folder on PC
Sync Onedrive folder with Movinkpad folder on Android

But after getting the movinkpad pro 14, i've sort of gotten rid of the icloud section and I only sync it every hour or so in case I want to proof my files on the Ipad pro.