Picture of repair missing SD-card lock
Hi this is my first instructable and i'm not sooo good at english, please be nice.

Today I wanted to save data on my SD card, but the lock (this grey thing you pull down to make the card write protected) was missing.
So i googled and found out that there is a button in the card reader. if open, the Lock pushes that button. but if its not pushed the card is protected, so i just have to push the button.
here i show you how to get your card to push that button.

SD with missing lock
straw (dry grass, etc)
aluminium foil.
scotch tape

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Step 1: Cover SD with alu and tape

Picture of cover SD with alu and tape
get a piece of the aluminium foil and stick it onto a piece of tape.

then put it on SD like in pic 2.

Step 2: Fill with straw

Picture of fill with straw
cut the straw into pieces that can fit into the hole the Lock left.

then fill the hole with them

and cover with the other end of scotchtape

Step 3: Try it

Picture of try it
insert into card reader. it should work, if not, try again.

use 2-3 pieces of straw
try to make the new "lock" the same size the SD is. 1 mm more and it will stick in card reader.
macpower1 month ago

THANKS SO MUCH! I just did this using a piece of toothpick split down the middle. I let everyone in my department know. It isn't often you get to fix tech with a toothpick and tape.

it did work, untill, eventually i got stuck and i got to take it out with a nailcutter, it did work, i love you man!

temporiari7 months ago

First instructable that actually helped! Thank you so much for this! Saved several bucks

tomasior9 months ago

As some of the posters above before mentioned: FORGET that straw pieces! Just solder the opening where the switch fell out with tape and anything non-transparent and it works again ;)

SeanM29 months ago

I would just like to say that you dont need the straw... actually if you just put tape over the lock mechanism, it unlocks it... just saying if you dont have straw, and it wont get stuck in ur computer like those other poor guys. :)


anuritikas10 months ago


anuritikas10 months ago


anuritikas10 months ago


fhszfsfs4 years ago
it worked, but maybe i put the foil too fat, as the microSD-adapter got stuck in the SD card-reader (which happens to be in-built in my laptop). So i had to force pull it out using a nailcutter (i did not have a tweezer, luckily by adjusting the angle of the nail-cutter i was able to get a hold). So i have now taken out the tape-foil and am going to try to superglue a little bit of plastic to the top part of the locking mechanism. basically there is nothing electrical/optical about the lock, it is just a piece of plastic which can slide to the on and off position. if the slider is on the top position, it is on, there is no lock. if you slide it to the bottom, it is off, and you write-protection is on, hence locked. even superglue-ing a little plastic to the top/unlock position will be risky, what if it comes off and gets jammed in the card reader? best thing is to use this adapter as a read-only stand-by and by a new adapter if you want both read-write functions. which idiot at Sony Digital designed this flimsy lock in the SD-Card/microSD-adapter? did they not consider that such a delicate lock, whose job is to push some little button in the card-reader, will frequently get broken? oh yeah, that's what his bosses wanted, so they could sell more cards. anyway thanks for your idea, it does work, i was able to write to the card with the tape on, but the card jammed and thus for me this is not a feasible solution.

See my comment above.

jasontaylor7111 months ago

IMO this is design could be improved. The reason is because the author's solution increases the thickness, which is bad, since it could cause the stick to get stuck in most readers.

In case anyone is interested, here was my improved solution:

p.s. That is from a meltable glue stick. Something like a razor blade or exacto knife may also used to ensure the grove is not filled.

kabzik1 year ago


kabzik kabzik1 year ago

it worked

teeja1 year ago
so i give you 5/10! and i'm very furious to listen to your stupid instructions! stupid boy,con
teeja1 year ago
mine is stuck into the computer? how is that possible? maybe i put a big of aluminium foil? please tell me? we must put a small pice or it is normal?!!!!!!!!!!
bakabr1 year ago
thanks so much. you made me happy for not having to buy another card.
Brojas1431 year ago
Life savor.
waterlubber3 years ago
There is no button, although this will still work. In every SD reader there's an Optical Sensor, which checks for the switch. If the switch is in the unlocked position, it will trip the sensor. Putting the straw in blocks the sensor, so you can write to it again.
kongbits4 years ago
Good Job!! thank you and thank you instructables!
thanks..... my card can work normally.... :o
pilif12p5 years ago
Yesh! It worked. I had an 8 GB card that i couldn't lose, had some really important pictures on it. Thank you SO much!
 don't know if you'll get this, but it's worth a try.

just saying thanks, this worked perfectly for my microSD card reader, looks exactly the same as the SD card you used in the pictures, saved me from going out and buying a new one.

My trans-flash adapter did this too, but I have like 5 or 6 cards, so I just tossed it. This is a cool fix though!
zimmemic25 (author) 6 years ago
tips on making i9nstructables welcome.
you got a nine in your comment!
You got a comment in my nine!
zimmemic25 (author)  reedz6 years ago
"Hey flie! There's a soup in my wayter
ac1D reedz6 years ago
You got a nine in your comment! So do I?
zimmemic25 (author)  ac1D6 years ago
ok i didn't mean tips on writing comments but on writing Instructables :-P
This would have helped me out a lot a month ago the exact thing happened to me with the same adapter. Instead of putting effort into fixing it i just got a new Micro Sd card (2g) with adapter for $15 a year or so ago i got a 1g micro sd card with the kit and it cost $40 the prices are dropping so much.
i "invented" this repair method when i was frustrated cause myy SD&Adaptor didn't work and i just put all things in that **************** switch i could find.

somehow i had a piece of straw in my room (there is a piece of everything in my room, mostly on the floor) and i broke it in2 parts and put it in the card and it worked. then i thought it would be better with a piece of scotchtape on it and so i made this.