We've got a big storm coming, so I have to close everything down. I didn't want to stop half way, so I went ahead and tried the above - got the following readout:
Warning: block count mismatch: found 64174080 but assuming 0.
\\.\E has 255 heads and 65 sectors per track,
logical sector size is 512,
using 0/f8 media descriptor, with 7716192 sectors;
file system has 2 32-bit FATs and 8 sectors per cluster.
FAT size is 7521 sectors and provides 962639 clusters.
Volume ID is 4ab860ba, volume label 3.6GB_DRV.
Does that all look right? Is the warning anything to worry about?
Explorer tells me it now has 3.67GB of free space... am transferring 2.51 GB of data back onto it... fingers crossed!!!