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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8 GB SD card shows up as only 6.47 GB after creating ext2 partition; how do I recover the lost space?

I have 8GB SD card and created 1GB ext2 partition on that. Today i format it and now it show capacity as 6.47GB. How can recover lost space ?
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1answer
8 views

Debian partitions on an SD card - how to fix?

Here's the output of sfdisk -l: Disk /dev/mmcblk0: 242560 cylinders, 4 heads, 16 sectors/track Units: cylinders of 32768 bytes, blocks of 1024 bytes, counting from 0 Device Boot Start End ...
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2answers
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Recover Data from Card that cannnot be read

I am trying to help a friend who is very concerned that she has just lost all of the data on her 32GB SanDisk microSD card. I told her I would post this and see if anyone could offer help. Here are ...
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2answers
42 views

Cannot remove partitions - losing disk space

I am using Windows 7 Pro, I have a 2GB micro SD card which I put a Arch Linux image (iso) on using win32diskimager. _ I no longer care about the iso image or any contents on this drive, I want it ...
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4answers
5k views

How can I test the full capacity of an SD card in Linux?

I purchased a 64 GB SD card from eBay. It works fine when I burn an Arch Linux ARM image to it and use it to boot up my Raspberry Pi. However, when I try to create a single ext4 partition on it to ...
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Is it possible to change the settings in android so that data is saved to the external SD card instead of the the phone's internal memory? [migrated]

This problem has been annoying me for a while. When I download and install an app to my phone it defaults to the phone's internal memory. Not too big of a deal since I can move it afterwards. The ...
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2answers
33 views

Cloning an image to a microSD card

I'm trying to set up a Linux system to boot off of a microSD card, connected via a USB card reader, and I'm trying to clone my existing Linux system image to the microSD card using Partmiage. Every ...
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1answer
2k views

How to rescue from an SD (SDHC) card that I can't reformat (possible hardware failure)

I have a transcend 16GB SDHC card and a lot of photos on it that I'd like to recover. When I plug it into the SD card reader, it takes a while for the Mac to even recognize that there's a disk ...
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4answers
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Is the lock mechanism on an SD card hardware, firmware, or software (driver,OS) enforced?

Where is the lock to read-only mode enforced with SD cards? Is this done inside the card itself physically, in the firmware of readers, or in the OS? (Some other place?)
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22 views

SD card seems to be empty and write protected

When I plug my SD card which has some video into my computer, it says that the SD card has 7.06/14.8Gb left. But when I opened it, there were only two folders which is DCIM and MISC. Inside DCIM ...
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1answer
29 views

Setup SD Card so it only runs on a single Windows 8 PC

A few of our staff are running Windows 8 laptops with only 100gig solid state drives. Recently some of them have been running out of drive space. The main user of drive space is the shared Google ...
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28 views

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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20 views

Deleting file in Active@ Undelete

I am using Active@ Undelete 9.5.59 to recover a folder that disappeared from my SD card. After performing a scan on my SD card via Active@ Undelete, I've found the folder. But Active@ Undelete don't ...
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3answers
27k views

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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2answers
3k views

Formatting FAT32 with 32KB cluster on Windows 8.1?

I'm lucky: I own a laptop only capable of running Windows Vista. I say this because I had to use said laptop to format an SD card to FAT32 wtih a 32KB cluster, something I found I'm unable to do using ...
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3answers
91 views

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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0answers
26 views

sdcard performance bottleneck

I have loaded my 4 GB FAT32 sdcard almost entirely with mp3 files. Now, I cannot remove none of them because "discovering items" never ends. Even command line tools last forever, including format e:. ...
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35 views

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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24 views

Macbook Pro Retina 15" Mid 2014 - Low Profile SD Adapter

I am looking for a Macbook Pro Retina 15" Mid 2014 Low Profile SD Adapter so I can expand the storage on a laptop (Model A1398). However every one of these adapters (on ebay, amazon etc) exclude this ...
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1answer
52 views

Is there a difference between SD cards from different manufacturers? [closed]

I thought 16 gb is 16 gb no matter who makes the cards, but I am now confident that's not the case although I don't know exactly why nor how. Can someone explain it to me? I make a lot of SD disk ...
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2answers
108 views

How do I wipe a microSD card that I can't write to?

I have a microSD card that has become read-only. I cannot write to it, or delete files from it, or format it, or repartition it. (Various computers think they can delete files, but after removing and ...
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27 views

Does static electricity affect sd cards?

I'm just wondering, because MicroSD cards are sooo tiny, and I feel like a little static electricity discharge would corrupt everything, since, I believe, SD cards run on flash which is basically ...
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1answer
160 views

What interface does a SD Card use?

What interface does a SD Card use? I looked at the Wikipedia article and they mention SDIO. However this seems to be just for non data transfer. Is the interface usb like? Completely usb? If it is not ...
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47 views

panasonic sd-audio format, does it exist?

I was wondering if anyone knows about sd-audio. I've a panasonic strada car audio head (from japan, in japanese, so I cannot understand much). It has sd card plugin, and menu item called sd-audio. ...
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3answers
11k views

Can I use dd to clone a larger SD card to a smaller SD card if the actual partitions will fit?

I have a 16GB SD card that has a few partitions on it (it's actually the card for a Raspberry Pi). I have several other 4GB cards that I want to clone the primary card to. The 3 partitions on the ...
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2answers
44 views

Image files do not show up on mounted SD card but are still visible via the camera

I am using Manjaro Linux on my Chromebook Pixel. My camera is Oly E-M5. I mount the SD card with the command sudo mount -t exfat /dev/sdc1 /media/sdcard The card seems to mount correctly, and I can ...
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4answers
147 views

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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4answers
10k views

Restoring a SD card after using it to root a device

I recently purchased the Nook Touch reading device. I rooted it using the instructions on nookdevs.com Rooting included using win32diskimager to somehow transfer an .img file onto the card. Rooting ...
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6 views

Locking Arch Linux with keyfile on USB

I'm currently preparing to install reinstall Arch Linux on my HDD and was going to encrypt the whole disk and then I saw this https://wiki.archlinux.org/index.php/Dm-crypt/Device_encryption#Keyfiles ...
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1answer
217 views

Micro SD card data loss/recovery

I have Patriot micro SDHC 32GB class 10 memory card. I use it only for saving pictures and videos taken with my phone (Galaxy S3 GT-I9300, CM 10.2 stable) and for saving music too. Basically all large ...
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1answer
140 views

Is my SD card physically broken?

I have a 64GB Kingston Micro SD card that I am wondering if could be physically broken since I am completely unable to repair or restore it. I have no data on it to worry about, so I only want to ...
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1answer
38 views

Recover my SD Card [duplicate]

In windows disk mgr I can see this. I have no option to shrink/expand any of the partitions. Tried to delelete everything by DISKPART, but that's also not working: DISKPART> list disk Disk ...
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1answer
48 views

Recover my SD Card

In windows disk mgr I can see this. I have no option to shrink/expand any of the partitions. Tried to delelete everything by DISKPART, but that's also not working: DISKPART> list disk Disk ...
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votes
4answers
5k views

Bypass read-only SD card with missing 'Lock' slider

I have an SD card, that is broken, the slider for the "Lock" is gone. When I put it into my computer it turned out to be in read-only, How can I override this with software? I need to format the SD ...
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4answers
2k views

Finding attributes of mounted SD card

My SD card is automounted fine as /dev/sdb: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sr0 11:0 1 1024M 0 rom sda 8:0 0 80G 0 disk ├─sda1 8:1 0 78G 0 part / ├─sda2 ...
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how to connect laptop SD card reader to vmware workstation 10 [duplicate]

I'm running vmware ws 10 on win7, and running fedora 17 under vmware. I'd like to access my laptop's sd card device from Linux, by connecting vmware to the sd card reader. This works fine with other ...
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1answer
55 views

Is there any way to find the remaining life on a SD card?

For SSDs we have a variety of programs that read their remaining life. I'm looking for the same thing for memory cards in a situation where they get a lot of writes. Google is not only not returning ...
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1answer
55 views

How to build an sd card image, without an sd card?

We have a scripted process that builds up an embedded install of Debian Jesse on an sd card. The relevant parts of the script look like this: export DISK=/dev/sdb umount ${DISK}1 # make sure no ...
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6answers
22k views

Installing Windows on an SD Card

Assuming you have a built-in slot, is it feasible to install Windows 7 (Vista, or XP for that matter) onto a 32gig SD card? By install, I mean house your windows folder and any OS required folders and ...
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1answer
1k views

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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XCube AOpen Ex915 Unable to see MS, SD, CIF, other card drives

I have an XCube AOpen Ex915 that is running XP. I am unable to see any cards that I insert immeadiatly. There have however been occasions where after several minutes I will be prompted by the open ...
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4answers
42k views

Reformat SD card to NTFS

I want to reformat a 16 GB SD card to NTFS so that I can use it to transfer large files (larger than 4 GB) from one computer to another easily, but my computer will only allow FAT ...
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1answer
551 views

Is there any way to instruct Windows to ignore the “write-only” mechanical switch on SD cards?

I have a bunch of SD cards that do not have the little plastic switch for the read only setting. so Windows thinks it’s write protected or something. The card is not write protected by the software ...
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0answers
43 views

Effectiveness of SD Card write protect switch as protection from viruses

Given that the SD card write protect switch simply indicates to the OS that it is switched, and doesn't prevent writes to the medium, how effective is enabling write protect against viruses? Are ...
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1answer
49 views

Change auto mount directory of SD card

I want to write a bash script to backup a certain directory, but only to a particular SD card. I want the script to have a way to check if this particular SD card is inserted. I run Lubuntu, which ...
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1answer
156 views

Format a protected (corrupted) sd card

Some days ago one of my micro sd cards (a 32gb by Samsung) "decided" it is protected. It has no physical switch and I haven't found a way to format it yet. Every software I try to use says it is ...
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votes
1answer
4k views

Windows XP does not see my SD card

I have an SD slot in my laptop. However, when I pop in an SD card no drive appears in My Computer. I've looked around in both BIOS and the Control Panel, and I can't seem to find any entries ...
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2answers
1k views

Windows not reading sd card, when every other device in the world can

Edit: as of October 8th I am still looking for an answer. I have also tested it from windows 7, same results. I have even gone into gparted, completely wiped all of the data (so it was just ...
2
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0answers
50 views

What is the purpose of the contacts under the sticker on the underside of this microSD card?

Many (most?) microSDs have a sticker on the bottom: I peeled one off, and revealed several small copper contacts beneath it: What is the purpose of these?
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1answer
92 views

64GB SDHC (_not_ SDXC) — how to get this to work with my computer?

I have here a 64GB Micro SDHC card. It is not labelled as SDXC, its manufacturer has quite clearly labelled it as SDHC. While this is not my supplier, the image at ...