[Q] Available Storage, hidden files? topic

I had created a nandroid backup on CWM before flashing a rom which failed, causing me to adb sideload back to my old ROM. But before doing so I attempted to restore the backup (which also failed). But after booting in, i noticed that I had multiple 0 folders in my internal storage. Now the available storage on my device does not add up. Also when I open the device on my computer, there is a 8gb zip file that always appears under the "0" folder. Even if I delete it, it returns after rebooting and it cannot be opened or copied. I believe the backup is hidden within this folder but I am not sure how to delete it. Does anyone have any ideas on how I can fix this issue?