C:\Users\Alexander>chkdsk F: /F
The type of the file system is NTFS.

Chkdsk cannot run because the volume is in use by another
process.  Chkdsk may run if this volume is dismounted first.
ALL OPENED HANDLES TO THIS VOLUME WOULD THEN BE INVALID.
Would you like to force a dismount on this volume? (Y/N) y
Volume dismounted.  All opened handles to this volume are now invalid.
Volume label is New Volume.

Stage 1: Examining basic file system structure ...
  256 file records processed.
File verification completed.
  0 large file records processed.
  0 bad file records processed.

Stage 2: Examining file name linkage ...
  282 index entries processed.
Index verification completed.
  0 unindexed files scanned.
  0 unindexed files recovered to lost and found.

Stage 3: Examining security descriptors ...
Security descriptor verification completed.
  13 data files processed.

Windows has scanned the file system and found no problems.
No further action is required.

 488383487 KB total disk space.
     76872 KB in 9 files.
        12 KB in 15 indexes.
         0 KB in bad sectors.
     81111 KB in use by the system.
     65536 KB occupied by the log file.
 488225492 KB available on disk.

      4096 bytes in each allocation unit.
 122095871 total allocation units on disk.
 122056373 allocation units available on disk.