I posted an article to this site “How to Back up your Travel Photos.” about 2 years ago.
The info in this post is still accurate and relevant except I’ve also discovered a way of backing up on the go without using a laptop.
Now I am talking about backing up memory cards not images taking on a smartphone. The smartphone images should be automatically backed up to the cloud if you have the settings correct.
But even with the latest DSLR”s and Mirrorless Cameras being able to send images to the cloud, their systems are still clunky.
So let’s get into it.
This video takes you through it:

For those who like pictures and words you need the following:
A Smartphone. I use an android so I’m not sure about iPhones. But I believe this system works with the latest models. So, if you’re in the Apple ecosphere you’ll need to do your own research.

A hub that has a USB-C cable and USB-A (and/or USB-C) connections.

A hard drive.

A memory card reader

Put it altogether and plug into the smartphone and then open “My Files” and you’ll see “USB Storage 1” and “USB Storage 2” plus “USB Storage 3” if you’ve plugged in 2 hard drives.

Go to the memory card storage, which is usually the one with the smallest storage, and find your way to the images.

On the settings button (in this case 3 vertical dots) and select edit and then select all. Tap “copy” and then go back and select the hard drive. Find where you want the images copied to and tap “copy here” and you’ll get a progress pop up.

The operation is complete once the pop up disappears.

Rinse and repeat if you’ve got another hard drive to back up to (recommended).