SQL Server Backup Devices and Methods Questions

Disk devices: These are files that are stored on the hard disk or some other storage media. They can be of a variable size........
Full Backups Differential Backups Transaction Log Architecture Backups.......
Full backups, as the name suggests is a back up of the files and folders. Frequent full backups results in a faster restore........
Transaction log records all transactions and the database modifications made by each transaction. Transaction log helps in........
File or Filegroup backups support backing up and restoring individual files or filegroups. This is usually used in very large database.......