The reason I asked is because I have a HD FOX T2 as per the thread. Not having a the right box at a guess if you select the move option it will prompt afterwards if you wish to delete the original content. If this isn’t the case you can always copy the content back from usb.
Highlight a recording and pres the opt+ key, highlight Move/Copy and press OK.
If you are relocating the recording internally to a different folder then it will Move, if you select and external HDD then it will Copy and leave the original on the internal HDD.