There is always a chance of Salesforce losing your data, however there are 3 other key reasons for backing up Salesforce:
- Incorrect Data Import – A mis-configured or an incorrect mass import of data can end up corrupting or overwriting existing records
- Rogue Automation – When running an automation it can inadvertently change and remove data
- User Error – Users can accidentally delete the wrong record or object
It’s also important to backup your meta data as well as your Salesforce records, these include: custom fields, page layouts, apex triggers and any other parts of Salesforce that you have customised.