We are sometimes asked why a file cannot be handled by PresSTORE even if the access rights are fully granted.
Often, problems arise from the limitations in the file system.
In case the file system cannot store a file because of its limitations, PresSTORE will show an error on that attempt.
For example, the maximum file name length on a HFS + file system is 255 characters.
When accessing the file's resource fork, some characters are added to the file name to address it.
In case the full name overgrows the size of 255 characters, the file cannot be accessed anymore.

The following Wikipedia article shows the limitations of many well known file systems.
http://en.wikipedia.org/wiki/Comparison_of_file_systems