How do you save loops on Boss RC 30?
To save an individual loop, just open the folder that it's in and copy the WAV file inside to your computer. You can also place WAV files from your computer into memory locations in the RC-30/RC-3.
Can I use BOSS RC 30 as interface?
The answer to your question is yes. It's not a USB "audio" interface, it's a USB "mass storage" interface.
Does Boss RC 30 have reverb?
Boss RC-30 Loop Station | Reverb.