I started to encrypt all my external storage weeks ago..I did not encrypt my sd card because I always store it in a very safe place..I mean in a very2 safe place..
Sometimes that doesn't matter. It's still removable media, and if you're concerned about your data enough that you feel the need to burn/smash/destroy the card to prevent someone grabbing your data, then you should be encrypting it... so that you don't end up worrying about it the
next time you have to upgrade SD cards.
after reading your post.. I took my sd card in the rubbish..burn it with my stove..and I cut it into a small pieces.. I guess no one can recover it now. Dont you think so? It may be excessive..but for my peace of mind..
At this point, it would take someone really dedicated, and maybe with thousands of dollars and a few weeks of time, to even attempt to recover the data. And there's still no guarantee their efforts would work, but the possibility though slim,
might still be there.
Would someone be willing and able to go through all that trouble to get your data? I don't know, because I have no idea what you were storing (and I don't
wanna know). That's something you'll have to figure out for yourself.
Next time, encrypt. Then, if and when you need to wipe the card clean, use
SD Formatter to low level format the card and wipe it completely clean. One pass should be fine since this is NAND flash, but if you plan on disposing of the card completely and never using it again, feel free to frag the sucker it with this program as many times as you like until you're content that the data is destroyed. Then, that's it. Though if you still want to cut, burn or physically mangle it, go right ahead.
This is better than burning/smashing/cutting, because you're explicitly told the SD card controller to systematically destroy the data on the card. Physically cutting or damaging the card is hit or miss...
maybe you destroyed enough of the storage media... or maybe not.
What I
do know is that the big selling point for solid state media, like SD cards, is they can handle physical extremes way better than hard drives and other storage. So I would prefer my solution - encrypting, wiping, and maybe wiping again to be sure - over physical stuff.