help with my memory card

The card was working fine two days ago, this afternoon I turn on my camera and I'm getting this message. any help?

I see in your equipment you have a T2i which was prone to issues with the SD card slot area. But start with checking the card then move to checking the camera.

Are there any valuable images on the card? If not do an in camera low level format and report back. Also, try a different card and see what behavior you get. Carefully check the plastic that borders the sliding contacts. It has been reported that some of the plastic may break off. Last thing would be to get a really bright light and look into the slot. You should see a switch that should line up with the notch on the side of the card near the lock switch. Do you see any damage on the switch? There are also some reports of people having issues that were fixed by filling the void adjacent to the lock switch and then applying scotch tape over the switch area. This enabled the camera to work.

The card may possibly be corrupt. Do you have a memory card reader you could try it in?

This is the first time my T2i has had an issue, and I've used many SD cards with it.
I've tried formatting it as I've already erased what was on there (or taken off) and I keep getting an error that Windows cannot format card. I've tried both the low level format and the other one (can't remember what it was but I am not home at that computer). And it came up with the error both times, I am having no issues with my other cards though, I've got 3 other working cards and I have no issues with them.
I went ahead last night and bought another 32 GB just like this one, just in case I have to trash this one.

My cards.
The transcend one is damaged (thanks to my son) but I am unwilling to get rid of it.

FreeSoul1987 wrote in post #18549314
I've tried formatting it as I've already erased what was on there (or taken off) and I keep getting an error that Windows cannot format card. I've tried both the low level format and the other one (can't remember what it was but I am not home at that computer). And it came up with the error both times, I am having no issues with my other cards though, I've got 3 other working cards and I have no issues with them.
I went ahead last night and bought another 32 GB just like this one, just in case I have to trash this one.

Based on these various comments, and the fact that memory is cheap, I would trash the card that gave you the original issues. Even if you get it working, why risk a chance it would act up again and at a time when you might lose valuable images?

By the way I previously mentioned a low level format in camera meaning don't do it in a computer. It isn't super critical but done in camera a very specific directory structure is established.

John from PA wrote in post #18549381
Based on these various comments, and the fgact that memory is cheap, I would trash the card that gave you the original issues. Even if you get it working, why risk a chance it would act up again and at a time when you might lose valuable images.

By the way I previously mentioned a low level format in camera meaning don't do it in a computer. It isn't super critical but done in camera a very specific directory structure is established.

I'll remember that. And yeah I'll go ahead and toss it.

If even Windows can't format with a card reader, the card is shot.

My question to OP, is there any reason you want a UHS-II card for a Ti2? It costs more and you won't have any benefit with Ti2.

eelnoraa wrote in post #18549696
My question to OP, is there any reason you want a UHS-II card for a Ti2? It costs more and you won't have any benefit with Ti2.

Good point, just go to Best Buy and get the card below for $20 (MSRP $55).

My experience is Lexar cards have more problems than other brands.

If a card ever plays up at all, either toss it out or have it replaced. It's not worth any risk. Test the cards each year, I use this.

What pieces of crap are SD cards in comparison to CF cards. I have had CF cards go through a washing machine and another chewed up by a puppy - they still worked (although I retired the CF card that was chewed up). I have never in over 15 years of shooting had a CF card go bad (although I did get two Kingston CF cards which were bad from the start). No more Kingston cards, no more problems

People complain that the Canon 6D2 only has one SD card slot. That Is my complaint too. Although the complaint isn't about one slot, I would be happy if the single slot was for a CF card. In fact I have had my 7D2 for several years now. It has a CF and and an SD card slot. I have only inserted an SD card in the extra slot one time to ensure that it was working.

Physically, the CF cards are a lot more robust. I cringe every time I put pressure on the SD card in my 6D2 and hope that the darn flimsy thing doesn't break...

RPCrowe wrote in post #18591046
What pieces of crap are SD cards in comparison to CF cards. I have had CF cards go through a washing machine and another chewed up by a puppy - they still worked (although I retired the CF card that was chewed up). I have never in over 15 years of shooting had a CF card go bad (although I did get two Kingston CF cards which were bad from the start). No more Kingston cards, no more problems

People complain that the Canon 6D2 only has one SD card slot. That Is my complaint too. Although the complaint isn't about one slot, I would be happy if the single slot was for a CF card. In fact I have had my 7D2 for several years now. It has a CF and and an SD card slot. I have only inserted an SD card in the extra slot one time to ensure that it was working.

Physically, the CF cards are a lot more robust. I cringe every time I put pressure on the SD card in my 6D2 and hope that the darn flimsy thing doesn't break...

I'm old enough that I don't buy green bananas, so I may not be around for the demise of CF cards. See https://www.imaging-resource.com …h-another-new-card-format

I have the issues with CF cards not SD and from Sandisk, weird, i can't use the card on camera or even card reader, and 2 of them are new, few old, so what will cause that then? And i thought that Sandisk is the best brand for memory cards and with a new one too.

RPCrowe wrote in post #18591046
Physically, the CF cards are a lot more robust. I cringe every time I put pressure on the SD card in my 6D2 and hope that the darn flimsy thing doesn't break...

This isn't necessary true these days and for a long time. CF card due to lack of market volume, there hasn't been any advancement in manufacturing process. If you open up a latest high end CF card, you will see flash (BGA or TSOP), controller, plus a few passive component surface mounted on a PCB. Physically, this design isn't very robust. It is prone to environment. The CF package is what protecting the internal components, which isn't very good.

A modern SD or uSD, they are made into what is called a SIP package. Controller and flash are all mold into a fiber glass like substrate, air and water tight. The only thing exposed to environment is the interface pins. From physical stand point, modern SD are a lot more robust. The picture above shows a broken transent card, where you can see PCB, it is a very old manufacturing process. Either transcent doesn't have the mean to do SIP or it is just a very old card.

Now, electrically, CF is a lot more robust. This is due to the high margin and low volume of the CF card. Manufactures are willing to do a lot of screening and testing, even burn in for the internal components. The flash you get in CF today is very high quality, much higher than even those you find in majority of the SSDs.

Tareq wrote in post #18648691
I have the issues with CF cards not SD and from Sandisk, weird, i can't use the card on camera or even card reader, and 2 of them are new, few old, so what will cause that then? And i thought that Sandisk is the best brand for memory cards and with a new one too.

What is the capacity and how often have you been using them? One of the legitimate reason for memory to fail is they got wore out. NAND flash can only support limited number of "Program Erase" cycles. Depend on the type and speed, the PE can be in the order of 1K-1.5K (MLC) or 30K-50K (SLC). It is very highly unlikely to wear out a SLC card. For low capacity card and high usage (video shooting), it is possible but still unlikely to exhaust the life of flash for MLC card.

Legitimate cause aside, defective cards are possible too, but I found it very unusual for a single person have multiple defective CF cards. Is it possible that they are counterfeit? Also is there any special handling or usage you are doing with the cards? Say you leave them the car or other high temperature environment all the time, high humidify usage ....