So I have a 931Gb portable SSD and so far transfered 416Gb of files (that’s what I get when I select all the files from the root of the SSD and click “properties”), I should have 515Gb of space left but it shows that I only have 238Gb on explorer.
Is there anything I can do to purge the ghost files that are living in my SSD?
Thank you!
I will describe one possible source of your issue (but there are others).
There are two sizes for files on a disk. “Size” and “Size on disk”.
There is something called the “allocation unit size”. If your disk is set up (formatted) to have a 4kB allocation unit size, then space for files will be allocated in multiples of 4kB. This means that a 1kB file and a 4kB file will both use 4kB on the disk. A 5kB, 6kB and 8kB will use 8kB, etc.
There are other allocation unit sizes. They go between bytes and Megabytes. It matters for performance reasons. Larger is faster to an extent, but it will cause over-allocation if you have lots of small files.