alt Hacker NewsDisk Drill saved me last year when file corruption hit one of my SDs.
I also have a policy where I don’t delete the files on the SD card until the very last moment when new files need to be written again. This gives me a window of time in which there is an extra backup in case of issues with replication from my initial local storage on my computer, to an external drive, to the RAID array, or to the cloud.
rm -rf after the initial copy from the SD card onto the computer is a bad idea, especially if the card isn’t immediately needed for new footage.
For convenience, I like to still have the files somehow marked 'already imported', so I've since modified my script to move the files on the card into an 'imported' folder. Then after the card gets full, I'll format it if I'm finished with the main project I'm working on.
I really wish modern cameras could stream over WiFi 6 or 7 (since it's just H.265 compressed, 50-100 Mbps) so I could either do NDI or a video stream off to my NAS. Still save to the card in the body, but also record over the network directly in-body!