I did download them on another SD card, but didn't save. After the data corruption message came up on the SD card I use, I deleted them from the other one but the message still showed up, so I used SVDT again and deleted the "SecretValue" files.
I think that's why they went corrupt a couple of months ago. I did download Red, Blue, and Yellow on my other SD card and it still had the saves. I deleted them "in-game" and then when I switched back to my other SD card. I went to try to play the games at a later date, and the message showed up on all 3 games, ugh! I can't believe Game Freak is that desperate, when it comes to save data on 18-20 year old Pokemon games!
Took me a long time to figure out how to use SVDT. Just last night, I finally restored them but once I switched my SD card, I downloaded them on a separate one. When I switched back, the message returned but I once again used SVDT to fix the issue. So I guess you can't have more than one copy of R/B/Y, which sucks, since you can only have 1 save file per game. Hopefully when I transfer my caught Pokemon to Pokemon Bank, then I can start over again.