Which file types are supported by Plesk File Manager?
Only text-based files can be viewed or edited in Plesk File Manager.
Indeed, it is possible to view some common image formats in file manager but only those that have "View" option in the drop-down menu.
Binaries, archives or any other complex data structures are not supported neither for viewing nor for editing. However you can upload a file with whatever type or extension you need.
More on uploading and managing files you can find here
You can also manage file permissions for the uploaded file in the File Manager.