Name three tools that can be used to backup data.
Three tools that can be used to backup data are cloud storage, external hard drives, and online backups.
Three tools that can be used to backup data are: 
1. The Cloud: Using cloud services like Dropbox or Google Drive for data backup can be a great way to protect valuable data. 
2. NAS: Network attached storage (NAS) is a reliable and cost-effective way to store data. 
3. CD/DVD: Use CDs and DVDs to backup data on a regular basis. 
They are a secure, convenient and cost-effective way to store large amounts of data.