Most characters in folder names and file names are supported with the following exceptions. If a file is uploaded with an illegal character, the software will either substitute any illegal characters in the filename with underscores, or reject the file/folder from import altogether. In addition, problematic characters, while not strictly illegal, can cause issues with encoding or workflows.

Illegal charactersProblematic characters

| (pipe)
+ (plus sign)
< (less than)
> (greater than)
: (colon)
/ (forward slash)
\ (backslash)
? (question mark)
* (asterisk)
. (period)*
.. (double period)*
\n (line feed)
\r (carriage return)

~ (tilde)
– (endash)
— (emdash)
“ (double quotations)
^ (caret)
% (percent)
! (exclamation mark)
$ (dollar sign)
, (comma)
; (semi-colon)
][ (square brackets)

*Single periods are illegal in folder names, double periods are illegal in filenames.