I think that 3 backups a week is not a great plan, unless the database has a "transaction log". With your current plan, you run the risk of losing data, as we know. It seems to me that a database product called mysql is in use. This product might not have the transaction log so in the event of a crash, you lose anything newer than your last backup. There is no way to restore data from the log. To better protect the database, there should be more backups per week, say 7 or even 14. There is no real need to save them all; simply saving the latest 3 backups would be fine.
My databases, (I am a database administrator), get completely backed up daily and we ensure that our transaction log is fully protected. The log is also stored on completely different disks which isolates it from general database failures.
Crashes like the one you have can happen at any time, so we like to minimize the downtime and eliminate data loss if possible.

__________________
VR
1967 250SL