SDHC (Secure Digital High Capacity) is an improved version of the usual SD card.

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117 views

How does 200x or 300x in relation to an SD card differ from the class rating?

I've always understood "class 10" (or whatever) to refer to the speed of an SD (or SDHC) card, but apparently ratings like 200x or 300x also refer to speed. How do the two rating systems differ? ...
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706 views

How can I determine if my Dell M4600 built-in SD card reader can support SDHC cards?

I'm running x64 Windows 8, and the SD card reader in my Dell M4600 is unable to read my SDHC memory card. The reader is listed as "SDA Standard Compliant SD Host Controller" in device manager. I'm ...
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252 views

SDHC unreadable on Windows 8 (but on OSX works fine)

Whenever I try to read a 8GB SDHC on Windows 8 (using two different card readers), it says that the card needs to be formatted, but from the camera (CanonSX240HS) the photos are readable. I have the ...
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2answers
877 views

Is there a tool for mac which checks the true size of a usb flash drive or sdhc card?

I need to check an SDHC card. Is there a tool for mac which checks the true size of a usb flash drive or sdhc card?
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383 views

microSD card suddenly inaccessible

I have a microSd card with an adapter and suddenly it was inaccesible in my computer... I would like to recover the data and the micro sd card :( the output of dmesg command: [ 3431.211177] mmc0: ...
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1k views

Are UHS SD Cards backwards compatible with existing readers and other hardware?

I was shopping for a couple of new memory cards for new cameras this year and noticed that there are some SD cards that are now UHS-1 compatible. I wasn't sure what that really meant so I went looking ...
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1answer
110 views

Installing Linux from an external card reader

I have this problem. I was experimenting if I could use a memory card (SDHC) as an USB drive for all intents and purposes, and when I put the card in an USB card reader, I can use it just like a ...
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3k views

I Can Edit SD Card on Windows XP but Not on Windows 7

I have an 8GB SDHC card which I have used to upload pictures onto my Windows XP machine using an SD card reader ("SanDisk Ultra II"). I could also delete pictures and create folders on the card. I ...
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10k views

Which Allocation Unit Size do I have to choose for my SDHC card?

I'm formatting my SDHC 4GB card before putting an OS on it for my Raspberry Pi. It says "allocation unit size" 32 KB and gives me options of up to 1024 MB. What do I do about that?
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152 views

Micro SDHC class 10 + adapter

I have bought a micro sdhc 32gb class 10 but my camera only accept std sd card, so i would like to know if the adapter will keep the same speed of the card, or there is some kind of class too. Thanks ...
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1k views

How can I access the files on my 16 GB SDHC card?

I own a Nikon camera which I use with a Transcend 16 GB SDHC card. The camera possesses a built-in formatting tool and everything just works, and I am able to take pictures and they are saved to the ...
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1k views

SDHC - Superblock issues when partitioning

I have tried with four different SDHC cards. The first set of two were 8 GB and the second set were 32 GB. Using GParted, I tried to partition in the following manner: I tried to make one ...
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169 views

SDHC 4GB - lost data including photographs

For some reason my memory card has lost all of the data on it - probably about 150+ precious photographs. I thought the camera was faulty, but now realise that it must have been the card. My husband ...
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2answers
2k views

Recover SDHC card used in an SD card reader

A while ago when SDHC cards were fairly new and all the office computers had only SD card readers, I made a 4 GB Class 6 ADATA SDHC unreadable and unformattable by trying to get it to work in SD card ...
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1answer
238 views

Will Texas Instruments' flash memory reader fully support an SDHC flash card?

I bought my laptop in 2006, and I have Windows XP Home on it. On my Texas Instruments multimedia reader says that it supports SD, but it does not say anything about SDHC. I heard some say to buy an ...
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3answers
15k views

Macbook Pro not detecting sd card

My sister has a sdhc card that has worked for a while, but when she tries to open it on her macbook pro, it doesn't detect it or mount it. It will work fine on other peoples computers, but not hers. ...
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2k views

Why does Windows 7 recognize a 4 GB SDHC card only with 3.68 GB? How to format/get 4 GB?

I have a Kingston SDHC card 4 GB speed class 4, but on Windows 7 it's recognized only with 3.68 GB space available. I've already formatted the card and I get only 3.68 GB. How I can get ...
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2answers
3k views

Recovering a damaged microSDHC

I just bought from eBay a Kingston 32GB microSDHC that was advertised as defective. The seller said that there could be formatting problems or with transfer of large files. Unfortunately, when I got ...
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1answer
549 views

dd gets slower while reading and writing

user@user-laptop:~$ sudo dd if=sd_backup of=/dev/sdd bs=4M conv=noerror,sync 205520896 bytes (206 MB) copied, 28.564 s, 7.2 MB/s 247463936 bytes (247 MB) copied, 57.1285 s, 4.3 MB/s 260046848 bytes ...
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1answer
400 views

What are some good USB-2.0-powered SDHC/SD card readers?

I'm looking to get a camera bag reader for SD/SDHC cards so that I can avoid having to plug the camera itself in to the computer. I'm aware of the SanDisk MicroMate. My only concern with that one is ...
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2answers
2k views

Recommended format for an SDHC card used for ReadyBoost ONLY

I have a spare 4GB SD Card that I'd like to test for ReadyBoost so I'm not going to use it for anything else (format portability here is not an issue). As I've read, exFat is a very nice format ...
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SD card failure, can't read superblock

What is wrong with my SD card and is it salvageable? At very least to get the current data off. Information: I have an 8 GB Transcend Class 6 SDHC card that I got for my camera recently. It ...
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4k views

How to use the 4-in-1 card reader on my Lenovo x100e?

My Lenovo x100e laptop has a "4-in-1" card reader that's supposed to handle SD/SDHC, MMC, Memory Stick and MS Pro, but I can't insert my SDHC card (a "SANDISK SECURE DIGITAL EXTREME SDHC 16GB ...
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690 views

Is it possible to boot a Linux installation on an SDHC card?

I tried to find a previous question on SU pertaining to this, but I'm surprised this has not been asked before. I have seen some deals lately for really cheap SDHC Class 4 cards, and would like to ...
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1k views

Windows 7 SDHC issues

Windows 7 64-bit is not recognizing a 4GB SDHC card. I can see the drive in Device Manager and it is assigned a drive letter (E:). However the E: drive is not visible in Windows Explorer, nor can I ...
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4k views

Moving Chrome OS from USB stick to an SD card

I have been able to install chrome OS on a 4gb flash drive and it boots just fine on my little ASUS eee900A. But I don't to worry about it sticking out of the eee and getting knocked out by accident. ...
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4k views

fsck error: currently, only 1 or 2 FATs are supported, not 34

Why do I get the fsck error: "currently, only 1 or 2 FATs are supported, not 34?" And what can I do to successfully run fsck? I'm fsck-ing my Transcend 16GB Class-6 SD card. It got corrupted recently ...
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4answers
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What to do with a corrupted SD card: reformat it or trash it?

I recovered all the files from my corrupted SD card today. What should I do with it now? Reformat and continue using it or throw it away and buy a new one Here's the details on the card and how ...
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2answers
9k views

How do I find out if my laptop will read an SDHC card?

I use an HP Pavilion dv6000 series laptop. Is there a way I can find out whether the card reader on this computer supports SDHC cards and what class?