The best thing you can do for the security of your website is to create regular WordPress backups. There are various free and paid WordPress backup plugins available, and the most of them are pretty simple to use.
UpdraftPlus is the most popular free WordPress backup plugin available on the internet. More than 2 million websites use it.
Jetpack Backups is a popular WordPress backup plugin developed by Automattic, which was founded by WordPress co-founder Matt Mullenweg.
BackupBuddy is one of the most popular paid WordPress backup plugins used by over half a million WordPress sites. It makes it simple to schedule daily, weekly, and monthly backups.
BlogVault is yet another popular WordPress backup service. It's more of a Software as a Service (SaaS) solution than a WordPress plugin. It produces offsite backups independently on BlogVault servers, putting no strain on your server.