CTS reminds you to keep at least one copy of your data in a place other than your computer.
Why should I backup my data, my computer works fine?!
The hard drive of a computer is where your data is stored and is one of the few moving parts in a computer. Like any moving part, it is subject to failure - it can be working fine one day and not operate the next. This is commonly referred to as a "hard drive crash." If this happens, the chances of recovering your information are slim to none!
Another reason is to backup is if you've unintentionally thrown away an important folder containing many files or overwrite a single important file with another. In years gone by when computers were simpler, it was possible to recover a deleted file or folder. Due to the directory structure and the optimization routines written into modern operating systems, this rarely works.
How do I backup my data?
There are several common methods listed below. The one thing all have in common is that you're making a copy of the file as a backup. The idea is to have two copies; not to use the below examples as your sole copy.
OneDrive: Provides 5TB of storage. Items can be dragged and dropped on the OneDrive interface or you can use the OneDrive client software to sync entire folders of files on your computer automatically to the cloud.
External Hard Drives: You may also purchase an external hard drive that connects to your computer via USB or Firewire (the latter is preferred if available.) This hard drive can be used to store additional information as well as backups of important data. Because of its size and speed, it's a good solution for backing up large amounts of data.
Time Machine: With an external drive (see above) Apple computers can use a built-in feature called Time Machine to do automated, hourly, incremental backups. The system works very well and is highly recommended for all Mac users, however there are limitations to fully restoring a hard drive because we use enterprise level options that the home user normally would not.