Remember to Keep Backups
If you're a techie, you can do some research on enabling RAID storage for your systems. RAID configuration is way beyond the scope of this website, but its something good for a geek to know.
One important point to note here is that if you are securing your backups with the same password as your main system, if someone figures out your main system password, they could wipe out both your main system plus your backup, leaving you with nothing. It's advisable to use a separate, distinct password for your backups.
If you're relying only on Cloud backup, just remember that things can happen that lead to corrupt files or accidentally deleted data. Don't assume that your Cloud backup is always going to work perfectly. I'd strongly recommend you keep a physical backup if you can do so securely. Obviously, if you have no way of keeping your physical backup safe, you have to weigh the benefits versus the risks, which is something only you can figure out on your own.
Apple computers have a mostly automated backup system called Time Machine which is great to enable if you have a USB hard drive or a wireless hard drive. If your Apple data is encrypted, the encryption should carry over when using Time Capsule. There are numerous solutions for Windows computers but I'll let you research that on your own. Just remember that even with Time Capsule, if your backup is located in the same building as your originals, it's at risk of being lost. A fire or flood could cause both the original and backup to be damaged or destroyed, leaving you with no copy of your data, unless you placed it on the Cloud, or you have a secure copy in another location.
If you choose to carry your data on a USB drive, you need to decide if you want to keep it encrypted (which I would suggest if you're carrying around any financial or medical information). If you're planning to keep a USB drive in your pocket, take into consideration that not all thumb drives can handle long exposure to heat, humidity, or exposure to water. If you're going to keep your backup data with you, please select a well-reviewed, rugged solution. Here are some examples.
