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.

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My SD card deletes new files by itself

I am using 64GB micro SD-Card. I always put it into my laptop slot for secondary storage. Recently, I found a big problem that my SD card won't work properly. I mean, When I copy new files to the ...
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187 views

Is there such a thing as a WORM (write-once-read-many) SD memory card or USB flash drive?

Do you know if exists a write-once-read-many (aka: WORM) USB flash or SD memory? I need an electronic write once memory to meet law requirements for storing sensitive data, and I want an alternative ...
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24 views

How to know if an SDcard is about to fail?

I have an SDcard that is still working fine for about 8 years now. I am using it for an DSLR camera. I am quite paranoid that it will soon stop working while taking photos of an important event. Are ...
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27 views

no /dev/*, but /sys/bus/mmc device info on damaged SD-Card [duplicate]

A friend gave me a broken SD-card, hoping I might recover something from it. I have no trouble mounting any other cards, whatsoever. I am not getting any block devices in /dev, but the mmc subsystem ...
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Performance difference between SD and MicroSD cards?

If you compare a MicroSD card with an advertised speed of 48 MB/S to a full size SD card with an advertised speed of 48 MB/S (from the same manufacturer), should their performances be identical? Or ...
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Cannot format micro SD Card in mac OSX 10.9

I tried everything but I cannot format it. When opening the disk utilities I get 2 partitions, one which is greyed out. When trying to format the first one it says "couldn't unmount disk". When ...
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1answer
43 views

Android can read my MicrosSD card but Windows cannot

I have recently bought this MicroSD card. The disk was working nicely with my both Android device and Windows PC (through its built-in MemoryCard reader). This is what I have done to cause the ...
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4answers
246 views

MicroSD card is not detected by Windows

I formatted my MicroSD card to HFS+ and then back to NTFS from within my Phone device (using an app namely Paragon exFAT, NTFS, and HFS+). Now that I insert the card into my PC (Windows 7), the ...
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What is the difference between the UHS version and the UHS speed class of a SD card?

What is the difference between a SD card UHS version (UHS-I or UHS-II) and the UHS speed class? It seems they go hand in hand. Are they just redundant (UHS-I is always UHS speed class 1 and UHS-II is ...
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How to use Cygwin to copy an image from an SD memory card

Long story short, I'm working on a Windows 7 machine and I'd like to strip the image off an SD card (backing up the card from a Raspberry Pi). I'm trying to use Cygwin, but not having much success. ...
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Is there a way to make a sd card WRITE/READ only - DISABLE ERASING

I'm a noob trying to find a solution to make a sd card write/read only? Like creating files is possible but to erase something you have to format the whole card. In terms of erasing you only can ...
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Windows 7 Virtual Memory Optimization - ReadyBoost vs. Flash Swap vs. RAM Disk?

At first i thought ReadyBoost means having swap file allocated to flash drive which is wrong because ReadyBoost serves as additional storage for swap file or should i say it mirrors swap file on hard ...
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21 views

Compatibility with FAT32 using 1024 sector size

On an embedded system, we are using FAT32 with 512 sector size on SDCard. We will be writing files of 800k and need to do this quickly. Our filesystem code writes in blocks of 512 to the SDCard ...
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10 views

SD Card Won't Mount

First off, the mount I am talking about is the SD card being able to be read/written to. So I have an Acer Aspire Switch 10 (AAS10 from hereon), Windows 8.1. So I wanted to look at pictures I took a ...
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18 views

SD Card Locked Error on camera

I have a Canon camera. Last week after recording some movies, it took so long to process, so I got bored, and unplugged its batteries :D Then I turned it on, it said "Memory Locked". I inserted the ...
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1answer
21 views

SD Memory card vs MicroSD with Adapter

Is a SD memory technically identical to a MicroSD with SD adapter? Can a software or reader distinguish one from other?
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301 views

SD card write protection

I'm trying to remove write protection from my 32 GB microSD from QUMOX. It worked till yesterday, when my phone said "SD card is damaged, try to format". So I did, no luck. Every time I try to write ...
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1answer
132 views

OSX: Making sure Dropbox always starts after SD card is mounted?

I have a Macbook Pro with a relatively small SSD, so I use a 128GB MicroSD card in a nifty little adapter I plug flush into the side of the laptop for some extra storage. I have quite a large ...
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1answer
4k views

Can't format or delete any files on SD card

I have a 16 GB SD card i'm trying to format for use. In Windows if I try to format it says Windows was unable to complete the format, and in Linux when I do fdisk -l -u, fdisk just hangs when the SD ...
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13 views

I don't know if my sd card is corrupted or what? [duplicate]

I can't format my sd card. There is details like memory available and use,I can open the contents, but when i open the content, it will like disconnected (?). It is also the same when formatting ...
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16 views

Extension cable for internal SD card reader

I have card reader of Dell Inspiron 5520. You can see it here: Y0W97 But the cable is not enough long. There is any chance to buy extension for it? Or maybe buy longer cable and weld it?
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2answers
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Windows 7: how to remove write protection for my SD memory card?

I am not able to write anything to my SD memory card, using Windows 7. How can I remove the write protection?
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1answer
96 views

sd card not detected at all in linux

My SD card reader is not detecting any SD card. There is no output from dmesg when an SD card is inserted. df does not detect anything and also nothing in fdisk -l. Does linux support SD cards? I ...
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14 views

How to Prove SD Card functions correctly

I recently bought a micro SD card from China. I am wanting to test it to prove that it actually works. I have been trying to install it with my new Raspberry Pi, but have been getting corruption ...
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1answer
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Why aren't SD card 'contacts' uniformly placed?

As you can see above, Some contacts seem to be longer than the rest. Also, on the SD card (2nd from top) the last one seems to be thinner and also closer to the seventh pin. Why not just uniformly ...
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1answer
291 views

Where to find Win32 Disk Imager or an alternative when you don't trust Sourceforge

I need Win32 Disk Imager in order to write Raspbian on an SD Card. It seems the place to find that software is Sourceforge, which nowaday can hardly be considered a safe place to download software. Is ...
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5answers
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How do I copy and write a partition table from one identical disk to another?

I've got several dozen Raspberry Pis that I use as part of a home lab experiment. I created an installation of Rasbian (the Pi-specific version of Debian) on one Pi, and I want to spread it to the ...
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2answers
47k views

How do you format a 2 GB SD card to FAT32 (preferably with Disk Utility)?

I've been looking around for a way to do this for a while, but I haven't been able to find the answer. I need to format my 2 GB SD card to FAT-32, but I don't see the option in Disk Utility. If I ...
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0answers
116 views

How do I read/write images to eMMC boot partition(s)

I tried this question on Stackoverflow but it was modded offtopic; they suggested I try over here... I have a bunch of non-working Android mainboards I need to repair. Many of them have corrupted ...
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15 views

How can I retrieve data from a SD Card when photorec doesn't work?

A friend of mine took pictures of a Halloween party with his camera, and when he put the SD card in his computer, some of the pictures went missing. Knowing that I have successfully rescued his HD ...
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27 views

Corrupted SD Card

I am using Micro SD Card for OS on my Odroid micro-controller. Today I figured out that my Micro SD Card is not responding. I plug into my Laptop ( Linux OS ) and after that in other laptop ( Windows ...
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1answer
66 views

Does the BadUSB issue also affect SD cards?

Since I've heard about the BadUSB issue where the firmware of a USB stick can be maliciously changed, I was thinking about ways to avoid this issue. Would using SD cards as an alternative to USB ...
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How many times can SD card be overwritten and how to find out the actual number of overwrite cycles

How to find out overall health of an SD card? In particular: Can I detect the number of remaining overwrite cycles? Or the number of actually performed overwrite cycles on particular SD card? Whats ...
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1answer
68 views

Are Class 4 microSD cards faster than Class 10 microSD cards for small files?

In a comment to this Hardware Recommendations SE question, Agent_L writes: There is no such thing as "fastest" card, eg cards with higher (like 10) class are faster for large files (eg video) but ...
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39 views

Sd card surface disk errors and fix

I am using 16 gb sd card I used mini tools wizard 9.1 to do a surface scan on my 16gb sd card and I got 960 bad sectors, my question is how do I fix it?
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SD card stopped working [duplicate]

My 3DS SD card stopped working after connecting it to my PC with a USB card reader. Mobile phone says that my card has no format. I have very important data in it, any idea of what could I do to try ...
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1answer
31 views

SDXC Write Speed Decrease Over Time

I've noticed in using my external SDXC cards that the write speed tends to decrease over time during a large file transfer. For example, when an SDXC card is plugged into the port on my 15" rMBP and ...
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1answer
30 views

Can't format sd card bootmrg virus

I can't format my SD Card I was try disk part, SD Formatter, Windows Disk manger But i cant format my SD card Its Showing 45 MB my card is 4Gb Tell me any other way to format It
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332 views

I want to read SMS from SD card

I have my SMS in my Nokia phone saved to the SD memory card in a folder called Private\1000484b\Mail2 (at least I think they are). The folder contains files with no extension whatsoever (just files). ...
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200 views

Surface 2 tablet: moving apps to sd card triggers errors

I'm trying to move the WindowsApps folder to my SD card on my Surface 2 tablet. It's a 32 GB model, and already out of storage. As a workaround (Windows RT forces uses to install only on the built-in ...
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11 views

Getting all partitions of an SD card to show in Linux

I have an SD card that I formatted using the Chromebook Recovery Utility. There was some free space after creating the recovery card, so I used gdisk to add a 13th partition. After creating this ...
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48 views

Set PERM_WRITE_PROTECT on an SD card on Windows

I'm running Windows 7 and I have an SD card that I would like to write-protect. It is a micro SD card, so it does not have the write-protect switch. Even if it did, I do not feel that the switch is ...
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3answers
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SD cards often mount read-only on Windows despite being unlocked and always working in cameras

I have a HP netbook that's at least three years old and running Windows 7 Starter. It has a built-in SDHC card slot. I have a couple of 8 gig SDHC cards that I switch between my digital camera and ...
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48 views

Recover important photos/videos from unallocated space on MicroSD card (if possible)

I'm trying to recover photos/videos from the unallocated space on a MicroSD card, which was used in a Samsung Galaxy S3 Mini GT-I8190N. The previously healthy card appears to have become corrupted, ...
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41 views

Unable to format memory card in PC [duplicate]

My memory card is not detected in PC. I tried the following but still could not recover it, Tried the HPUSB format tool it says "Memory card is write protected". Right clicked on my computer -> ...
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1answer
33 views

Tracing storage media ejects and disconnects

I had a SD card that I kept permanently plugged into my laptop. Had, until I noticed it was missing this week. I don't know when exactly it fell out, the laptop may or may not have been in suspend at ...
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How do I repartition an SDHC card in Windows?

How do I repartition an SDHC card (4 GB or more)? Do I need third-part tools or Linux (a live CD solution would be OK)? In Windows' Disk Management the option Delete Partition is dimmed out: ...
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1answer
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Error whilst initializing SD card on Linux

I have noticed troubles with my microSD card in my Android phone and when I tried to insert it into my Linux laptop, I get the following error in dmesg: [ 247.588279] mmc0: error -123 whilst ...
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38 views

Is it possible to backup data on a piece of external media (SD card) and nothing else to my HD?

This is about Windows 7 (Ultimate, x64). Inserting a SD into its slot and right-clicking on its icon has "Properties" last in the menu. When I choose it, the last entry on the second tab ("Tools") ...
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Can a SD card with bad eraseblocks be salvaged?

I have an SD card on my Raspberry Pi (formated with ext4) that always shows errors at mount time, even after a fresh fsck run. I suspect it is a cheap card with no wear leveling, and some blocks got ...