If your laptop computer gets stolen, having most of my important documents and photos backed up saved my butt. I’ve met many travelers who’ve had a hard drive fail on them, losing thousands of priceless travel photos.
In addition to photos, keep digital and physical copies of your passport, driver’s license, birth certificate, health insurance card, serial numbers, and important phone numbers ready for an emergency. Backup your files & photos on an external hard drive. This is the hard drive I use. It has plenty of storage as well as online storage with software like Backblaze 

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