Comment 6 for bug 425405

This isn't really the appropriate place to ask for support, and g-s-d probably isn't doing anything wrong in your case. It calculates the free space remaining after calling statvfs on the particular volume, so you probably really are running low on disk space. Please post the output of "df -h" so I can tell.

And yes, filesystems do have limitations on how many files / folders can be stored, and how large the partition size can be etc. Those aren't bugs though, but rather limitations of the file system structure (eg, FAT32 has a maximum file size of 4GB and maximum partition size of 2TB). That's not your issue though