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)
Step 1: Cover SD With Alu and Tape
then put it on SD like in pic 2.
Step 2: Fill With Straw
then fill the hole with them
and cover with the other end of scotchtape
Step 3: Try It
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.