Memory card error Canon ELPH530HS

SOURCE: memory card error after inserting SDHC card on powershot A620

the a 620 only goes up to 2 gb no higher

SOURCE: I have a new Canon

Insert the card into a card reader and format it on the computer. See if that works. Format using FAT32 as its more reliable than the FAT it uses by default. If the camera supports FAT32 you can expect it to last atleast a year before you need to format it again

SOURCE: My old memory card was

If your old memory card was "busted" is it possible youhave damaged the memory card holder/reader in the camera?
Anyway, seems memory card problems are not uncommon with this camera.
It might be worth your while to have a look at http://web.canon.jp/imaging/eosd/firm-e/eos
This enables a firmware update which may (or may not) fix your problem.

SOURCE: when putting a Lexar Multi-Use 16 GB SDHC memory card in my Canon Powershot A540 I get Memory Card Error message as well Card Locked message. Have tried unlocking it by the slide on side of card, is t

It's a lost cause. The A540 works with SD cards. While SDHC cards will fit into the slot, they are electronically incompatible and will not work in devices not designed for them. You need to stay with SD cards, 2GB and smaller.