Specifies file types which are allowed to be uploaded.
Possible Values: any valid Internet Media Type
This property defines a list of allowed content types. When no value is given for the property, files of any type can be uploaded. If value(s) are given, only files of the specified type(s) can be uploaded. The file type should be given as a valid Internet Media Type as defined by the IANA here:
To add multiple types, right click the property name and select 'Add Another Allowed Type'.