Another way I’ve used to save space is to, “Squish” files
(this can be done natively in XP & up, for the older OS’s you need WinZip or some file “compression” utility)
1) find a folder with a ton of my files
2) rt click or hit the “context menu” key on the keyboard
3) select “new”
4) “compressed zipped folder”
5) name it to whatever the content will be ie BMP’s.zip, JPG’S.zip or just “ZippedUp.zip”
6) double click it or click and hit enter
7) a new “Explorer” window opens
go back to the other window and select all the files in it
9) rt click and hold while dragging the files to the other window
10) a little context menu asking if you want to copy or move the files, select move.
this creates a “single” file containing all those files within it thus saving wasted clusters for files that don’t use an exact cluster size ie
4096, 8192, 16384, 32768, 65536, etc.
if your files aren’t these sizes they waste space.
the good thing about the native XP “compressed zipped folders” is that the files in it are availible to open just by opening the folder as you would any folder in explorer and opening the file or draging the file to your application, and for the others like WinZip etc. you need to open it first but hey if it saves space it’s still worth it.