FAT 32 has a max of: 65,534
NTFS has a max of: 4,294,967,295

I'm think you also said you renamed these file in an earlier post, so this
might help
Click 'Start' then 'Search'.
Then pick 'All files and folders'.
Next: In the 'All or part of the file name:' field, type: "thumbs.db"
(without the quotes)
In the 'Look in:' field, select only the drive (usually C letter where
your folders/pictures or files are stored.
Next click the 'More advanced options' button and check the 'Search hidden
files and folders'
and 'Search sub-folders' options.
Now click on the 'Search' button located in the bottom right corner.
When search has completed, highlight all the thumbs.db files, right click
and select 'Delete'.
Now reboot your PC and Windows will build a new set of thumbs.db files, one
for each folder that you selected 'Thumbnail view'.

See if this speed things up.
JS

"JD" wrote in message
...
Is there a recommended maximum number (or size) of files in a folder or
sub-folder? Is 500 too many?