Custom folders do not end up completely at the end of the hard drive. Some files are still in the middle of the disk. They are not fragmented, but should nevertheless also be processed.
Version : Defraggler 2.19
Windows : Windows 10 Pro 10.0.10240.16463
Affected folders :
/MSOCache
/Windows.old
/Windows.~BT
/$SysReset
/Recovery