Your data really isn’t safe unless you’re backing up properly and with lots of redundancy. The computer backup rule of three, also known as the Backup 3-2-1 rule, can help ensure that your data is safe.
Using just one kind of backup (e.g., an external hard drive or SD card backup) is really not a backup. For real protection you need off-site backup storage (e.g., an automated cloud solution), finding the right program for your business will prove to provide the right protection on the Cloud.