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Questions tagged [sd-card]

Secure Digital (SD) cards are a widely used memory card format used by many technology brands brands in portable electronic devices such as digital cameras.

SD cards are 24mm x 32mm in size and have high transfer rates at low power consumption which makes them popular for battery powered devices.

SD cards are an improvement of the MultiMediaCard (MMC) and have in turn been improved as products termed SDHC (high capacity) and SDXC (extended capacity).

Smaller versions known as the miniSD card (20mm x 12.5mm) and microSD card (11mm x 15mm) also exist.

See also:

888 questions
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What's the life expectancy of an SD card?

I have some SD cards that I use. Is there a limit to how many times I can write over them? If I leave information on a card, is there anything that can cause it to lose this information eventually (other than a magnetic field)? What's the preferred…
Yuval
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What does 100x mean, for an SD card?

When I read the information about an SD card, I notice there is an information that is reported as 100x. What does that mean? To what is it referring?
apaderno
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How to delete files from my indestructable memory card?

A week ago I started getting intermittent IO errors accessing the SD card on my rooted Evo 4g. I eventually plugged it into my windows machine and tried to format it. It appeared to work, but when I unmounted and remounted the card all the files…
Matthew
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128 MByte vs. 128 GByte

I recently saw a comparison for 2005 vs. 2014 microSD card: in 2005 there was only max 128 MByte microSD cards, and in 2014, 128 GByte. My question: I'm not 100% sure. Is 128 GByte 1000× bigger than 128 MByte or 1024× bigger?
evachristine
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Which consumes more power: hard drive or SD card/card reader?

If I want to maximize the battery life on my laptop, where should I store my programs: my magnetic hard drive or my 16GB SD card? If you say hard drive, does a card reader draw significantly more power when a card is inserted (but not accessing it)…
William C
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How do I fix my SD card after it was split into multiple drives by Windows loT core?

I installed Windows loT core onto my SD card and used it for my Raspberry Pi. Upon deleting the OS, I found that my SD card had been split into multiple drives. Is there a way to fix this? I can't add a screenshot as an unexpected error occurred.
Caleb Morrison
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Expected lifespan estimate for SD card used in read only mode

I know that SD cards, like all things, have a limited lifespan and I know that they can handle a limited number of write cycles, which is usually what limits the lifespan. But what is an MTBF estimate for an SD card that is only wirtten to once and…
EMan L
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Secure Erase equivalent for an SD card?

SATA devices and NVMe devices support Secure Erase where such a command can be issued like this in the case of supported ATA devices. But I can't seem to find anything about how to erase an SD card in such a manner. Is there a way to wipe the drive…
etnguyen03
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Does an SDHC card have any write (ECC) error recovery?

What happen if an SDHC card gets a write error (damaged cell / bad sector)? Will the whole card be unusable (to trash, all data written to that sector now and in future will be lost)? Or rewrite sector (flash memory get corrupted when writing so…
marc
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Transistor count of a processor versus a micro SD card

I was recently quite surprised to find out that modern CPUs only have around 2 billion transistors and even GPUs like the GTX 1080 Ti have only 12 billion. A quick calculation on the other hand shows that a 256 GB micro SD card has roughly 1…
Hadi Khan
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Unable to format RAW SD card?

The phone is suddenly switched off when I copying files to my Micro SD. After that my phone couldn't detect that SD. Then I insert it to pc using card reader. when I try to open SD drive on pc, the sd card suddenly unplugged. It's happening many…
dharsh
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SD Card calculate lifetime

I wanted to calculate the lifetime of my SD-Card but i am not sure if i do it the correct way: My SD-Card uses SLC Flash which can have about 100k write cycles. I write a new file to the card every second, the filesize is about 50 KB. With wear…
Jodo
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SD Card Reader not Appearing

I have a Lenovo Y50 laptop, with a built in Card reader. It was working one day, R/W normally, and then nothing. Nothing shows in Disk Management, nor Device Manager, even when showing hidden devices There's no action/sound whatsoever when I insert…
harley_woop
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Micro SD 32 GB shows up as 50 MB

I just bought a Micro SD a month ago, now I want to use it and I plugged it in into my pc. The original size of the SD is 32 GB and on my PC it's showing up as 55MB, I also tried to format it and tried it on other devices. Is there anyway I can fix…
Kanariepiet
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How to tell the SD card version?

As I understand, an SD card can be V1 or V2. Within the V2 catagory, there is non-SDHC and SDHC. I have an 1 GB SD card. Is there any software or anything that I can tell if it's V1 or V2?
lang2
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