Environment :
Server 2008r2
SQL 2008r2 - 3 databases
External (E:) is backup location - USB 2.0 external hard drive
Scenario:
Configured a scheduled backup in SQL management to do a differential on each DB once a week (3AM), This was about 6 months ago. As you can see there was no full backup scheduled ( Learning experience!) and there is now, about 900GB of data on this external 1TB HDD. I have set a new schedule to be, a differential everyday 3AM(overwrite for now) and a full backup once a week (2AM). Attached is the amount of data that i thrown some math at to figure if i can keep the data on the external and implement the new schedule. According to this math i can but here is my Question:
By selecting overwrite for the differential backup, will the deletion of such a large file (800gb) cause an issue with the scheduled tasks from running properly? Also could i set the differential to make 7 copies (one for each day) and then overwrite a new copy every week, if so how?