write-protected usb flash drive

Gary Aitken freebsd at dreamchaser.org
Sat May 24 14:22:27 UTC 2014

On 05/24/14 00:01, Polytropon wrote:
> On Fri, 23 May 2014 18:26:44 -0600, Gary Aitken wrote:
>> I'm having trouble locating what I want --
>> a physically write-protected flash drive.
>> My searches so far have come up empty.
>> Thought someone here would know of one if it exists.
>> I don't want or need additional encryption gimicks on it.
>> Anyone know of one?  32G or larger
> I have been using something similar, even though it's not _exactly_
> what you're asking for. My "solution" (haha): Get a SD card with
> the required capacity and initialize it as intended. Then use the
> write protection slider. The card is now write protected. Then get
> a USB card drive (usually in the shape of a regular USB stick, for
> example a USK SD/MMC/MS-MMC USB 2.0 card drive) and put the card in.
> Now you have a write-protected USB drive. :-)
> There are two advantages:
> a) In case of media failure, just replace the SD card.
> b) In case of reader failure, just replace the drive.
> Additional fun: If you use a SD->µSD adapter, you can also use a
> micro-SD card. The adapter then provides the write protection slider.
> The mentioned advantages still apply. :-)

I like this option better than the Kanguru one,
mostly because the kanguru drives seem to not be very robust;
lots of failures reported.

I don't see why it wouldn't work, but have you tried formatting / 
initializing SD cards from the USB adapter instead of a device like a


More information about the freebsd-questions mailing list