Files uploaded to your FTP Today account are limited by your subscription size. In this example the subscription level is Compliant Enterprise that has 25GB of space total.
*Please note these examples assume there is no data on the site*
Using the plan above the largest single file you can upload to the site would be 25GB.
FTP Today does not limit the number of files you upload.
Using the plan above you could upload 10000 files that total 25GB.
All data uploaded to your FTP Today account counts against the total. You can view your Storage Quota for your account on the Dashboard.