If you are a M3 user, you may login here:

Avoid having to verify your email address,
and drop-off files to non-M3 users.

Anyone may perform the following activities:

Drop-off (upload) a file for a M3 user (email verification required).
Pick-up (download) a file dropped off for you.
M3 users: you may login with your username and password and send files to anyone, in or out of M3 Design.
Non-M3 users: you cannot log in, but can still send files to M3 users if you know their email address. Start by clicking the "Drop-off" button.
M3 users who wish someone outside M3 Design to send them files, can make it a lot easier for them by logging in and clicking "Request a Drop-off". That saves the other person having to prove who they are. The request created will be valid for 7 days.
M3 | FileShare System is a service to make it easy for you to move files, including large files up to 20.0 GB, in and out of M3 Design.
How secure is M3 | FileShare System?

Files are automatically deleted from M3 | FileShare System 14 days after you upload them.