Most hotels will have slow but unlimited wifi. If you use something like resilio sync, syncthing, or photosync, you can transfer the day's photos and videos ove

Most hotels will have slow but unlimited wifi. If you use something like resilio sync, syncthing, or photosync, you can transfer the day's photos and videos overnight while you're sleeping. Links here: https://photostructure.com/faq/how-do-i-safely-store-files/#how-do-i-back-up-files-on-my-phone https://photostructure.com/faq/how-do-i-safely-store-files/#... Also: if they do decide to mail SD cards, have them only send backups, so if it's lost in the mail is not a tragedy. There are USB OTG dongles you can attach to an Android device to make SD to SD copies, using a file manager on the smartphone, so you don't have to lug around yet another computer.