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Which characters ARE allowed in file/folder names in SharePoint?

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  • I am asking the OPPOSITE of that question. – Mrs.M. Aug 7 '15 at 8:03
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Here is the list of characters which you can't use as per MSFT; the rest you can.

File names

You cannot use the following characters anywhere in a file name:

Tilde (~)
Number sign (#)
Percent (%)
Ampersand (&)
Asterisk (*)
Braces ({ })
Backslash (\)
Colon (:)
Angle brackets (< >)
Question mark (?)
Slash (/)
Plus sign (+)
Pipe (|)
Quotation mark (")
  • You cannot use the period character consecutively in the middle of a file name.
  • You cannot use the period character at the end of a file name.
  • You cannot start a file name by using the period character.
  • If you use an underscore character (_) at the beginning of a file name, the file will be a hidden file.
  • File names and folder names may not end with any of the following strings:

    .files
    _files
    -Dateien
    _fichiers
    _bestanden
    _file
    _archivos
    -filer
    _tiedostot
    _pliki
    _soubory
    _elemei
    _ficheiros
    _arquivos
    _dosyalar
    _datoteke
    _fitxers
    _failid
    _fails
    _bylos
    _fajlovi
    _fitxategiak

In addition, file names and folder names cannot start with the “vti” string, such as the followings:

_vti_cnf
_vti_pvt
_vti_bin
_vti_txt

https://support.microsoft.com/en-us/kb/905231

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  • According to the link, the ban for + sign is only for site names, subsite names, or site group names – andrii Feb 17 '18 at 23:34
  • Manually tested with SP2016 on premise: &{}+~ are allowed for file names. You cannot use the period character consecutively in the middle of a file name. - not confirmed. You cannot start a file name by using the period character. - not confirmed. If you use an underscore character (_) at the beginning of a file name, the file will be a hidden file. - not confirmed. file names and folder names may not end with any of the following strings - not case sensitive. file names and folder names cannot start with the “vti” string - case sensitive. – Oleg Savelyev Aug 21 '18 at 14:19

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