Undeletable files taking up space on my VMU? How do I fix this?

[TheXboxArcade]

So I was using Dream Explorer on my Dreamcast to download some saves and DLC for Sonic Adventure 2, and after downloading the ones I wanted and going back into the Dreamcast menu, I opened up my VMU in the menu, and for whatever reason, the files I downloaded are missing, but the blocks on my VMU (which is a 3rd party MadCatz one, if that affects anything) are still being used. I deleted all unnecessary files I could on my VMU, leaving only 28 blocks worth of saves (a savefile for SA1 and SA2), but I still only have 58 blocks remaining on my VMU, even though I should have about 172 blocks free. Does anyone know how to fix this issue without me having to reformat my VMU? Thanks.

[mrneo240]

You can reformat it in the DC menu. Other than that idk.
Maybe
Defragment somehow

[Falco Girgis]

Damn. You have no way of getting this VMU flash image onto PC do you? I'd like to see wtf is going on with it in ElysianVMU.

[TheXboxArcade]

Damn. You have no way of getting this VMU flash image onto PC do you? I'd like to see wtf is going on with it in ElysianVMU.

I don't think I do, sadly. Out of curiosity, what would you need to copy the flash image to PC?