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

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

Anyone may perform the following activities:

Drop-off
Drop-off (upload) a file for a Sift user (email verification required).
Pick-up
Pick-up (download) a file dropped off for you.
 
Sift users: you may login with your username and password and send files to anyone, in or out of Sift.
Non-Sift users: you cannot log in, but can still send files to Sift users if you know their email address. Start by clicking the "Drop-off" button.
Sift users who wish someone outside Sift 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 24 hours.
 
Sift Fileshare is a service to make it easy for you to move files, including large files up to 2.0 GB, in and out of Sift.
 
How secure is Sift Fileshare?

Files are automatically deleted from Sift Fileshare 14 days after you upload them.