Introduction: Repair Missing SD-card Lock

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

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.


MUBAIWA WILLIAMM (author)2017-07-05

this worked for my SD card thank you so much

Shankar Sagar R (author)2016-10-07

yo bruv could you explain how it works

GrabovacD (author)2016-08-30


NadunT (author)2016-07-12

thanks guys!best inscrutable !!!! it save my SD card....

gamma radio (author)2016-06-17

Thanks , it saved my 32gd SD card

mhfarzane (author)2016-04-16


MartinP96 (author)2016-03-24

Thanks it worked but if your card gets stuck in the camera there is a grove at the top of the card to help you pull it out

slang2 (author)2015-11-18

Only thing to be careful about is that the card can't be too thick where it's taped up, or it could get stuck in your camera/card reader/etc. I just cut a very tiny paper rectangle (5mm x 3mm), folded it in half, put it in the space where the switch normally sits, then taped it up with cellophane tape. This way the increase in thickness is minimized (only the thickness of the cellophane tape on both sides.)

You can't use just cellophane tape by itself, because the optical sensor won't see it. But a thin piece of opaque tape by itself should be fine.

jmilton5 (author)2015-09-01

Works fine indeed. My advice to avoid it being stuck in adapters or laptop is to use a USB Card-reader or insert it gently back in the camera as the card access is easier to handle, hook the camera or reader with the USB cable/adapter to the PC or laptop, copy all and then gently remove and DESTROY the SD-card. This is not meant to be a permanent solution.

DamjanaJ (author)2015-08-16

It works for sure...THANX...because I had on that SD important photos and videos;)

macpower (author)2015-06-09

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.

dennis.setiadiprajoko (author)2015-04-22

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!

temporiari (author)2014-12-12

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

tomasior (author)2014-10-24

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 ;)

SeanM2 (author)2014-10-21

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. :)

Arduino Projects (author)2014-09-25


anuritikas (author)2014-09-17


anuritikas (author)2014-09-17


anuritikas (author)2014-09-17


fhszfsfs (author)2011-08-02

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.

jasontaylor71 (author)fhszfsfs2014-08-16

See my comment above.

jasontaylor71 (author)2014-08-16

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.

kabzik (author)2014-03-08


kabzik (author)kabzik2014-03-08

it worked

teeja (author)2013-12-23

so i give you 5/10! and i'm very furious to listen to your stupid instructions! stupid boy,con

teeja (author)2013-12-23

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?!!!!!!!!!!

bakabr (author)2013-10-25

thanks so much. you made me happy for not having to buy another card.

Brojas143 (author)2013-08-02

Life savor.

waterlubber (author)2012-02-22

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.

kongbits (author)2011-04-19

Good Job!! thank you and thank you instructables!

b_arirachmanto (author)2011-03-24

thanks..... my card can work normally.... :o

pilif12p (author)2010-06-19

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!

stoopidification (author)2010-02-03

 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.


computerwiz_222 (author)2009-08-23

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)2008-08-12

tips on making i9nstructables welcome.

Sandisk1duo (author)zimmemic252008-08-12

you got a nine in your comment!

reedz (author)Sandisk1duo2008-08-12

You got a comment in my nine!

zimmemic25 (author)reedz2008-10-25

"Hey flie! There's a soup in my wayter

ac1D (author)reedz2008-08-12

You got a nine in your comment! So do I?

zimmemic25 (author)ac1D2008-09-06

ok i didn't mean tips on writing comments but on writing Instructables :-P

i make shooting things (author)2008-08-12

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.

zimmemic25 (author)2008-09-06

ok i have 2 problems: 1) i'm german and dont know so many product names (i had to babelfish "scotch tape") 2) it's 8:30 PN here and i'm tired, maybe i can understand what u say tomorrow ;-)

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