This is a subscription app for all the features costing $72/year. ($6 per month) The free version only has a 10GB file size limit and is only available to the receiver for 2 days. The full (subscription) version allows 50GB files and the available time is "user configurable". Given that this is a service I can understand the rational of a subscription. However if you are not an active user or you don't to share files over 10GB, there may be less expensive options available elsewhere. Since this is an occasional need for me,, I use the free versions ICloud, Google Drive, or Onedrive which I find adequate for my needs.