# I broke my SD card expansion card and fixed it with a write protect switch

**URL:** <https://community.frame.work/t/i-broke-my-sd-card-expansion-card-and-fixed-it-with-a-write-protect-switch/85209>\
**Category:** Expansion Card\
**Created:** [October 1, 2026, 9:06am UTC](https://community.frame.work/t/i-broke-my-sd-card-expansion-card-and-fixed-it-with-a-write-protect-switch/85209 "2026-10-01T09:06:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![002](https://avatars.discourse-cdn.com/v4/letter/0/a6a055/32.png) [@002](https://community.frame.work/u/002)\
**Post date:** [October 1, 2026, 9:06am UTC](https://community.frame.work/t/i-broke-my-sd-card-expansion-card-and-fixed-it-with-a-write-protect-switch/85209/1 "2026-10-01T09:06:21Z")

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Hi all,

While testing half-length SD cards (so they don’t stick out of the expansion card), I broke the write-protect switch in my SD Expansion Card. Being cheap and lazy, I fixed it instead of replacing it.

Comparing it to a SanDisk UHS-II reader, I found the WP switch pins on the 21-pin socket. **Shorting pin 21 to pin 17** makes the reader always treat the card as writable, like a microSD. Card Detect is a separate switch, so this shouldn’t affect power consumption.

Check the pins with a multimeter before shorting anything. Also note that the lock slider on your cards will be ignored afterwards.

sorry for the bad photos.

 ![IMG_20260925_132448_853](https://us1.discourse-cdn.com/flex001/uploads/framework3/original/3X/e/7/e7fdd99d4e29dabe5e4d4ce8b36624038765b46d.jpeg)

 ![IMG_20260925_132445_964](https://us1.discourse-cdn.com/flex001/uploads/framework3/original/3X/9/4/94f11760cba554d3a1f9483929de05ee4a6680b6.jpeg)

I hope I posted this in the write place.