For safety, you should have multiple copies of your camera images. Keeping at least three copies stored in different places is best.
This is a challenge when traveling light and in locations where you don’t have a network connection.
Use Extra Memory Cards
A way to keep your load light while saving adequate backups is to use extra memory cards until you have access to a computer or network. That might not be until the end of your trip.
You will need a camera with two card slots and the feature to copy images from one slot to another.
Most cameras with a copy feature include the option of copying only the new images, making copying faster and easier to fit into breaks.
Advantages
- You only need to carry some extra cards instead of copying devices.
- Low-cost cards can be used for the backup copies.
- You can add more capacity by simply buying more cards.
I have used this technique successfully with these cameras: Canon R5, Nikon D850, Nikon D500, Fujifilm X-T3.
Check your camera to see if it will work for you. It made field backups much easier for me.