Disk Transfer
Disk transfer is the amount of data transferred back and forth within a specific period of time. Your hosting plan incurs data transfer every time a visitor views your website, every time you upload or download a file to your FTP account, every time someone submits your form, and so on. For example, if a user views a 1 megabyte video on your website five times during a day, then your account has used 5 megabytes of disk transfer. If that same user gets onto your forum and uploads 3 pictures, each 1 megabyte in size, then your account has now used 8 megabytes of disk transfer.