Mirgolth

Here is a Defrag vs Defragler screenshot. You can see the volume DATA is correctly showing on Defrag despite it doesn't have a drive letter.

OK. Diskeeper, for example, allow to defrag such a partition.

Here is a screenshot. You can see that the partition DATA on disk 0 is not showing on Defragler

Hi, On my main disk I have 2 NTFS partitions. The first is mounted ? C: ant the second is mounted as the NTFS folder C:\Data. It doesn't have any own drive letter. The partitiion don't show in Defraggler until I add it's own drive letter. My suggestion is to detect partition mounted as NTFS folder.