hyperdeck onto sandisk 480

regrettably, i did not compress a recording the other night and have eaten up al memory on both 480gb disks. moreover, i cannot play hem back through quicktime. presumably, the video file is too large to travel via usb 2.0 to my mac book pro. also, i've tried the reformatting option on mac, but it simply ays i have no more storage left on dick. any suggestion on how to reformat the file now? if reformatting is not an option, how can i simply delete the file altogether?

transfer the file to your computer hard drive and then work on it from there.