I have a USB 2.0, 500 GB HDD. I am writing a bunch of data to it, that I previously recovered from the drive.
I have formatted the drive in exFAT, since the drive will be used with Windows and OSX.
At first, I tried using Windows explorer to move the files over to the drive (about 160 GiB worth) but after copying about 30% of the data (according to TeraCopy), Windows Explorer reported the drive as out of space, and that it was completely full.
WinDirStat only showed the size of data that had been copied over... Where did this extra space go? Why is there a 300+ GiB discrepancy between the usage reported by the files and what Explorer sees?