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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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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286 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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120 views

dd an image, but only getting a fraction of the space on my SD card

I downloaded an image of Ubuntu Linaro. I then dd the image onto an SD card that is 32GB as follows: sudo dd bs=4M if=ubuntu-14.04-hdmi-z7010-20140611.img of=/dev/mmcblk0 Works fine, I can boot ...
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2k views

Format 64gb SDXC card as NTFS file system

I've tried using Windows (8), Linux (Ubuntu 14.04), and Android (Samsung Galaxy S4) to re-format my old SD card. It is currently formatted in exFat, and it seems that during an rsync 3 of my music ...
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1k views

How delete “Other” files in SD card windows phone

When I opened Storage Sense from my Lumia mobile, it has a section of other files. And it is saying around 1.3 GB of other files are present and they were not recognized. It also says, connect mobile ...
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172 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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648 views

MIcro SD card gets slower after partial fullfillment

I have a micro SD card from Kingston - 32GB class 10 When i'm writing on it using usb card reader or my phone, average write speed is about 6MB/s But after about 10GB of data written into it, ...
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644 views

Android: External SD Card storage size

I have a Samsung Galaxy S4 Active SGH-I537. I let it format my Samsung Class 10 SDHC 64 GB card. It used exFAT format. I then transfered my MP3 collection to it, which is about 34 GB. When I finished, ...
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21 views

SD Card disappear from Windows on Macbook Pro after waking up

I have the SD Card for my Macbook Pro running Windows. Every time the laptop goes to sleep and wake up, the SD Card disappear. It only comes back if you restart - I tried install new BootCamp driver, ...
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65 views

32GB Sandisk unable to be formatted

I received a Sandisk 32GB microSD from my dad who asked me to format it. Plug it into a USB-based adapter (no write protection switch) and tried to access it on my computer. Problems : right ...
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32 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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128 views

How do I boot from SD card on Toshiba Satellite A300D-21R?

The problem: I recovered a quite old notebook(Toshiba Satellite A300D-21R -- can't find it in Toshiba discontinued products... This model just doesn't exist on the internet) without a harddrive so I ...
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359 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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212 views

Eject USB drive using the explorer

When I right click a drive in the This PC view which is associated with an SD card I have the option in the context menu to eject it. If it is associated with a USB flash drive this option doesn't ...
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170 views

SD card not detected

I have a SD card with photos I'd like to recover. The card suddenly stopped working in camera, maybe because of the temperatures like 40C outside. The camera can't read the card and advises to use ...
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133 views

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 ...
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94 views

Can't recover sd card

I have a SD card I can no longer access. I would like to recover its data. I use a USB SD card reader. When plugged in, the SD card is not mounted, not shown with fdisk -l. Output of syslog when ...
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47 views

SD card img file copying on linux

I am trying to make Banana PI bootable SD card. First delete old partitions from SD, then create two new partitions and format them as vfat and ext4, as here described Then copying disk image: sudo ...
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215 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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243 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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825 views

Filesystem on sd-card lost

Last time I want to bring my photos from SD-card (Sandisk Ultra SDHC 32 GB) to my computer (windows), my computer said that there is no file system on the card and I should format the card. Also my ...
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91 views

Use SYSLINUX to boot from a separate device

I have a laptop with no harddrive that I'm booting from a modified persistent LiveCD thumbdrive, but performance is terrible due to the low speed of the thumbdrive. I also have a class-10 SD card of ...
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248 views

Internal card reader not recognized on boot

In 9/10 times, my internal card reader is not recognized when booting my pc. It's a desktop computer and the card reader is attached directly (internally) to the mainboard (Asus H81M-K) via 9-pin ...
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383 views

No Read/Write SD Card Permissions on Windows 7

I'm sorry, I try as often as possible to avoid repeating questions but I've tried the suggestions on previous threads here and elsewhere and I cannot fix it. I have an SD card I'm trying to open ...
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88 views

Quicktime killed my AVCHD file

I have a Sony DSC-HX50V photo camera. The system I have been using for video storage is this AVCHD thing, which consists of a big file storing all the videos. Using Quicktime under Mac OS 10.9.2, it ...
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675 views

How to repair SD card that was unplugged during formatting?

I tried to format my SD card on my Windows computer but unfortunately I pulled it out during the process. Now it can't be recognized. I tried to wipe it using disk utility on Mac OS X but after it's ...
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111 views

My micro SD card issue

I have a micros SD card. When I put it into my windows 7 machine using USB adapter, windows explorer shows that and I also can open it and see the files and folders. But I can't run the files and open ...
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1k views

Micro-sd card readable but not able to write or format

I've a Sandisk 64gb class 10 microsd that used to work fine. All of a sudden it has become read-only. I can read all files, but I cannot delete/add any files or format the sdcard in Android, linux or ...
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2k views

SDcard /dev/sdb2 is apparently in use by the system; will not make a filesystem here

I divided my sdcard into 2 partitions, but It got an error and couldn't create a new partition. Error: /dev/sdb2 is apparently in use by the system; will not make a filesystem here! My ...
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62 views

HTC Android Fails to mount- Mount from computer?

I Have an HTC Incredible S (S-Off, Rooted, ViperVIVO 1.3.0 ICS) that has seemingly ceased to posses the ability to mount its SD Storage to my computer. For whatever reason, whenever I plug in my ...
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142 views

SD Card Not Detected…Any Last Resorts?

I've got a 16GB Class 10 SD card that I've been using in my Raspberry Pi. It became unresponsive last night and my only other option was to pull the plug, which I know was more than likely to cause ...
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242 views

Windows detects SD card but can't read it's contents

All of a sudden my Windows XP PC can't read what is on SD cards and some USB sticks. Even though the drive is detected, it shows it empty. I don't have that problem reading the same cards on my ...
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165 views

Windows can't access/modify large SD Card Files

I have a 32GB SD Card I use with my GoPro. It's FAT32, and I'm running it on Windows 7. I have 50 files or so on it of videos from my GoPro. I can copy all but two off of it. Those two are the ...
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187 views

How to clone a SD card from HP network attached photosmart printer using Linux?

How to make a low level (file system unaware) cloning of a SD card inserted in an HP Photosmart printer, which is accessible via a local network ? smb://192.168.1.58 (192.168.1.58 is my printer IP) ...
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175 views

One particular SD card not working

I have a 32 GB SanDisk class 10 SDHC card. It works perfectly in my camera and in my netbook. However, when I plug it to my notebook I got this in dmesg: [ 1824.729234] mmc1: error -110 whilst ...
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385 views

My files on micro SD card not showing on macbook pro 13"

Used to work fine. Could it be a virus from Window PC, I can't see my photos on SD card on mac. Is there any way to copy these views. I know I can try it on Windows PC and that might work but I don't ...
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871 views

What are my best options to recover data from a faulty SD micro card (used in an Android cell phone)?

My wife is having troubles while syncronizing the data from the SD micro card of her LG android phone to her portable pc. It keeps remaining stuck forever at a given photo (#21). I tried to access it ...
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64 views

Are SD flash memory cards “secure”?

Regarding SD flash memory cards, SD stands for Secure Digital. Do SD cards or any of its variants (SDHC, SDXC) have any particular security features compared to other types of flash memory cards such ...
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384 views

Partition SD Card?

I want to partition the SD card so that I can use Apps2SD application (on my Android phone, a Samsung GT-i5503). I just would like to know if I can partition my SD card using "Computer Management" in ...
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49 views

How to check if SD/USB card become corrupted?

I have some raspberryPi2 model-B boards, using USB drives as their root filesystem. As it turned out, the USB chips I had chosen are prone to build up tremendous heat, and after 6-8 months, they ...
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27 views

Internal SD Card Drive not Returning/Waking up after Sleep/Hibernate

Here is the setup: I have an internal SD card reader in my laptop. It contains a 32GB SD card that contains my research library. Information I use on a regular basis. The problem: When the ...
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8 views

After resetting my Linx7/Win10 tablet - can't see MicroSD in Settings/Storage

It has worked before the reset (complete, removed all files). I can see/use the SD card to save files in Explorer, etc., but do not see it in Settings->Storage. Once I format the card/change drive ...
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25 views

Rescue SDcard spoiled by Android phone

My SD card is dead. It is a sandisk 32GB model (genuine one as I bought it from a well known seller). All I can see is a partition with 32MB total space. I've tried to recreate the partition table in ...
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7 views

Enabling DDR in SD/MMC causes problems? CMD 11 gives a response but the voltage switch wont complete

I am trying to enable DDR in sd (spec above 2.0) the procedure in the specifications is as follows Execute CMD0 to make the card idle. Execute CMD8 to enable ask about the voltage requirements ...
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11 views

Link errors with symlinks

I've moved all the files of ./usr to an external drive /home/Linkados/usr (SD card 8Gb) using $rsync --progress -l -r /usr /home/Linkados/usr Then I created a symbolic link from my SD to my flash ...
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29 views

Photos app won't display recent pictures

On my Tablet running Windows 10, the Photos app will now longer display new pictures synced to the SD card of the device. This behavior started in December 2015 - so Pictures from November or earlier ...
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19 views

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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31 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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24 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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23 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 ...