PowerShot SX740 HS Only Sees Memory Card as Locked

[joeldexter]

My Canon SX740 HS will not read a Sandisk Extreme Pro SDXC USH-1 300mg/sec. No matter where I set the lock switch, the camera sees it as locked. I reordered the card and got the same results. Any help?

[shadowsports]

Greetings,

2 cards with thew same issue?  Try this.  Remove the card.  Reset the camera's settings to default.  Power off the camera, ensure the card's protection switch is off.  Re-insert and re-test.  If it continues, the sensor in the card slot might be faulty or need service.  

[normadel]

What SIZE (Capacity) is your memory card?  Yes, though your camera is "compatible" with SDXC, there likely is a limit as to how big a card it will work with. 32GB is usually a sure thing. 64GB is less likely.. You're better off having multiple smaller cards than one huge one anyway, for safeguarding what you shoot.

[joeldexter]

It is a 128gb card. Canon says that the camera will handle that. So, I'm thinking it's the speed? I use a 64gb extreme Pro and 170 mb/sec without issue. Thanks for your response

[joeldexter]

I have no problem using a smaller card and Canon says that this camera should handle the 128 gb. Thanks for responding.

[normadel]

You answered your own question. You can read a lot of threads on here about cameras that do not like SD cards larger than 32GB, maybe 64GB, despite what the manual says. It's not speed-related. They just don't like larger cards.

128GB is a very big card. You shouldn't be leaving so many photos on one card that you need more than 32GB. Even that is a lot. Having thousands of photos on one card is risking great loss if a card goes bad, is lost or damaged, etc. Rotate multiple cards for safety. Move files to your computer, external storage, etc. One card in the camera shouldn't be long-term storage.

[joeldexter]

Thanks. I always back up to a laptop and back the laptop up to two different extra hard drives. I'll return this card and order a smaller one.

[normadel]

Good luck returning the 128. Get MULTIPLE smaller cards.

[joeldexter]

Amazon Prime takes them back without much difficulty, but I do pay for that through the yearly fee.