I'd be really glad if anyone of you could help out a desperate newbie..
I recently borrowed a Korg Volca Sample from a friend and just tried to upload a new sample to it with Caustic Editor for Android (I'm also using a non-Korg power supply).
Before that, I deleted one sample from the slot I tried to fill up. I marked that slot with "delete", hooked my phone up to the Volca and started to sync. Everything worked out and that slot was empty. I then unplugged my phone and wanted to prepare the sample, the sync cable was still plugged into the volca though. When i unplugged it from the machine and turned it off and on again, all the sample slots were empty. The volca itself is working and showing everything in step mode etc., but is playing nothing since the "sample" knob shows "S.---".
I haven't done anything since then.
I'm pretty screwed now, as I deleted all of my friend's samples from the machine... is there anything I can do besides apologizing

Thank you so much for your help,
-neinkob