Users without CloudStor accounts can send files to you using CloudStor FileSender Vouchers.
FileSender Vouchers allow non-CloudStor users to send files to you via FileSender. This is done by sending Vouchers to the external user.
Select the "Vouchers" tab from the FileSender page and enter an email address and message for the external user you wish to send a voucher to.
The external user will receive an email with a link to FileSender which will allow the external user to drag and drop files into a FileSender window and send them to you, much like normal FileSender transfers, but the external user can only send the files to you.