Endurance cycle of NAND chip inside Sandisk Extreme SSD 240GB

[scavness]

With regards to endurance, I am curious about the write cycle count if I began writing 10GB files to the drive until it filled up. We need to archive public meetings (audio/video) to the drive and never erase any files once they are written. Or to say it another way, if I have 24 sessions of plugging the drive in (stays turned off until needed) and writing 10GB per session, how many write cycles occur per NAND cell? I think the answer is 1, but I don’t know how writes/erases happen for this memory type. Bottom line, reliability for reads from the device decades after files have been appended to the drive with no erase ever executed. Thanks!