Is it free ?
For easy use, yes.
You can upload up to 3 free shares per day (500MB each) without cost. If you need more disk space, want to manage or organize files,folders,shares,sales,invoices,
to authorize authenticated people only, be notified by email or sms when downloads occur, show a preface and logo to downloaders, just try a first 49 GB volume, it's 5 euros per year!