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What does the lock switch do on an SD card?
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Aug 25, 2019 14:55:47   #
Soul Dr. Loc: Beautiful Shenandoah Valley
 
macrose wrote:
Thank you for this. I have a card that mysteriously got locked and I could not use. Now I know how to unlock it. I was unaware of the little switch on the side.


See, someone benefited from this whole shebang!

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Aug 25, 2019 17:57:59   #
GrandmaG Loc: Flat Rock, MI
 
nadelewitz wrote:
Did you ever wonder what the Lock switch on an SD card actually does?

I've presumed it switches something inside the card itself.

Well, thanks to getting my hands on an old transparent SanDisk SD card, I saw that the switch doesn't do that.

It is just a sliding tab. The actual electrical switch is inside the card slot of the camera, card reader, computer, wherever. The position of the card's switch just presses the REAL switch in the card slot, or not, depending on its position.

But BEWARE.....I discovered a couple of my cheapie USB-SD Card readers do not have the switch in them, and "locking" the SD card DOES NOT write-protect the card.

There's always something to learn about the technology we use, huh!
Did you ever wonder what the Lock switch on an SD ... (show quote)


I did not know that! Thanks for the heads up! Although, I almost never flip the switch; but it is good to know for the 2 cards I did flip the switch on!

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Aug 25, 2019 19:38:49   #
RPaul3rd Loc: Arlington VA and Sarasota FL
 
Nice to see constructive dialogue. I always use the lock switch when I switch SD cards cause I don't want to take the chance of losing photos.

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Aug 25, 2019 22:29:59   #
bellgamin Loc: Ewa Beach, Hawaii
 
burkphoto wrote:
Geez, this thread is like an episode of Seinfeld — not funny and much ado about nothing.... ...
Tu Tu true. (I never "got" Seinfeld. I suppose I'm too old and out-of-date... like my Brownie cameras.)

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Aug 26, 2019 04:16:26   #
aellman Loc: Boston MA
 
rjaywallace wrote:
UHH member “nadelewitz” -
Respectfully, I suggest taking your question to websites for SanDisk, Delkin, etc.
What does it really matter what gets triggered where? The lock tab works.


I found his post wandering and lacking a clear answer to the question in the title.

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Aug 26, 2019 07:29:18   #
duane klipping Loc: Bristow iowa
 
nadelewitz wrote:
Jeez, why are people making an argument out of this?

I OBSERVED AND TESTED what I was saying in the original post.

I HAVE card readers that DO NOT have the switch in the slot, and DO NOT prevent writing when the card is "locked".

Just trying to offer some advice that could save someone some aggravation.

You're welcome!


I doubt Bob was arguing with you and you seem too sensitive to respond to. Cassettes and video tapes have a plastic tab that can be broken off to prevent over righting the tape. Cards work on the same principle. The "switch" is in the device not the media.

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Aug 26, 2019 10:08:36   #
mikegreenwald Loc: Illinois
 
I checked a bunch of my SD cards. They ALL have the switch. I opened an old one; nadeleiwz is right.

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Aug 26, 2019 12:13:53   #
RPaul3rd Loc: Arlington VA and Sarasota FL
 
All of mine have the switch as well and it has saved my careless butt on more than one occasion.

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Aug 26, 2019 14:29:36   #
TBerwick Loc: Houston, Texas
 
nadelewitz wrote:
Thank you for concurring in what I originally said. I hope rjaywallace gets it now.


Just don't engage. I typically do my best to ignore the snarky, no help commentary we sometimes encounter.

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Aug 26, 2019 14:31:12   #
74images Loc: Los Angeles, California
 
Bottom Line... with the Switch it Protects your Images if the Card is Filled Up & you have Priceless Images you have Shot on your Card & you don't have them Transferred to Computer, Storage, or Flash Drive.

When I Finish Using Up my Cards, I Lock Them so I don't by Accidentally Erase any of my Important Images, I'm Now Transferring to Flash Drive, & will Still Keep them for Master Copies, if Anything Happens to the Flash Drives.

As for the Older Cards that Came Out Around the Turn of the Century, when Digital Cameras were Taking Off, I Can't Speak for the Older Switches.

74images

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Sep 1, 2019 11:57:08   #
JD750 Loc: SoCal
 
aellman wrote:
I found his post wandering and lacking a clear answer to the question in the title.


The title question is rhetorical.

OP was simply providing information on the mechanics of the lock switch.

One important take-away is that the lock does not always work it depends on the reader being used.

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