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Most file types that you can upload upto 25MB . However, you will not be able to share executable (.exe) and music files. E-books,
comics, music videos and short films are allowed.To prevent piracy and copyright infringement,you will be able
to report files the same way they can do with other content on the
site.
just simple steps to share the file
Select the upload file option in the group and follow the same produre as you do while uploading the image...
Note: if you are sharing a project file or similar to it then make sure that it is a zipped file.