Originally Posted by Witchfire
The only way I can see this possibly creating more available space is that the NtfsMftZoneReservation setting on the original drive was set to 2, setting aside 25% of the drives capacity for MFT usage, and somehow the process negated the MFT and allowed it to be formatted for general usage.
Yeppers. Have 1-4 as options.
If your drive has mostly large files, and not any or a few duplicates, reducing the MFT size can reduce disk waste from 25% to 10%.
I still compress all data that's not going to be used within a month (setup a partition or folder for that task). Or, use 7-Zip or WinUHA and compress the contents to 1/4 or less it's size. Some of my folders are 8GB in size just for data, after compression it can be 800MB or less. So in essence that 160GB drive has data at least 3x it's size on it.
Everything but programs can be compressed without much performance loss (and another tip: save as .bmp, and use 7-Zip or WinUHA to compress such files. More compression than JPEG or PNG can give, and it's totally lossless).