Mapping and not displaying photos

Despite consistent access permissions (security settings - system-admin users PC owner), I realize once again:
Photos are listed, but the thumbnail is not displayed.
Delete also not then leave the files comes the message: file does not exist.

What can there be? boudoir photography
I urge again all raw files after the attempt of deletion, they are again listed.
I get the Drehwurm slowly.

as a Thumbsübersicht, which looks like this:
the list is only times not recognizable, which file there isn't actually.
Delete goes well with CTRL key not.
Read-only access is unlocked I still not properly understood the problem.
is the folder located on the hard disk of the pc?
Quote: Clara Bunny 24.04.14, 14: 03Zum cited BeitragRufe I after trying the deletion again all raw files on, they are again listed.

How do you access the raw files?
was "update" made? the files are on an external hard drive
and the search is carried out via the Windows Explorer and there to find sorting by date taken to double
F5 Refresh was made
but as I also wrote - some files can be not to delete, because supposedly no can be read. It is but not zero files neither c nor d is enough space to move the files.

BUT - at gmx you offered something just as drivers check to and from Medion PC is also the
and there are 10 driver obsolete including USB 2 (plates are USB3)
because I from beginners days white, I the cart that can drive in the crap, I have to wait unfortunately until GG which takes care of. good photography ideas
screenshot - when both programs were listed. PS cache is always flushed Harald blade
I would have to relocate 350 GB, which is the small pile
the great had 779 GB - and that is certainly much double
I am also the external shift intended to then format. Ever tried a different program?
for example, total commander or norton commmander?
What operating system (what windows) is used for what?