How to unlock/unprotect the memory card of canon digital camera

[mgcole]

Have Canon A 540, loaded new SanDisk SDHC card....says Memory card error. Card locked. I removed it and slid the tab on side of card down...reloaded...moved it back n forth 3X. Still says locked. Did I purchase the wrong card?

 

[kenrivers]

You might find your answer here: http://www.tomshardware.com/forum/272402-32-flash-drive