In Canon

Kodak memory card and a canon A540 digital camera you have flipped the switch on all 4 cards many times and it is still saying it is locked how do you unlock them they were working perfectly until you?

The first thing to check is the locking switch on the side of the card, making sure it is in the upward (toward the contacts) unlocked position. If you've already tried this, (MORE)
In Canon

How do you unlock a Canon SD memory card?

on the side of the memory card there is a little like...i don't know, thing,, and its a different colr the the memory card and it's on the top corner of one side of the memory (MORE)

How To Unlock A Memory Card?

Memory cards typically contain a small switch. One of the switchesstates will lock the memory card, preventing data from beingwritten, erased, or changed on it. The other stat (MORE)