I know that popular backup method for HA on raspberry is to clone SD card, then old SD card become a backup and new SD card will be in usage. This solution is great. But I will understand some things:
Theoretically two cards are 128GB. But there will be some bites difference between this cards. What will happened when new SD card capacity will be lower?
Can I just copy data from SD card to new one? Will it work?
I’m newbie, so please be patient.
Best regards
By far the best way to do backups is. Setup automatic backups to a different device like a NAS. then do a new install if needed and restore backup. And if doing it this way you don’t have to stop your server to make a backup. Cloning a card is easy enough but a bit long winded when there is no need. If you use the wrong program to write the new card, it won’t like the difference in size, its been so long since I have done it that i cant remember which program to use.