You need to unblock this content by setting your broser.
ブラウザーはこの内容をブロックしないように設定してください。

INFO:
Transferring files to M-Files is very easy. Files can be transferred by dragging and dropping or by copying files or folders to the M-Files document vault.
Transferring Files to M-Files by Dragging and Dropping | Intelligent Information Management System | TeamRelated