Also, when a full database backup is taken the backup process reads the data file as well as the active portion of the transaction log, so when the restore occurs it will roll back or roll forward any transactions that were in play during the backup. When a transaction is committed to the database the values are written to the data pages, so when the database is backed up it also has these values. On SSMS, I don't see a simple recovery can use to backup file.
See the other pages in this tutorial for how to actually do the backup. Hi Tan, the recovery model is just how the database works to save transactions and this impacts what types of backups you can do. Set SQL Server Simple Recovery Model using T-SQL
Type of backups you can run when the data is in the "Simple" recovery model: