HiLetgo 5pcs Micro SD TF Card Adater Reader Module 6Pin SPI Interface Driver Module with chip Level Conversion for Arduino UNO R3 MEGA 2560 Due

I was looking for a way to write to an external device on a project and I found this little adapter, boy does it work nice! Instead of writing to the onboard flash, I wanted save that from excessive abuse and write the log data to an external sd card. Arduino or Pico2W (these are the only two chips I've tried so far). Yes, it even works on the RPi Pico 2 W. I know you've been told it doesn't but with the proper sdcard.py library files, it works flawlessly. At least up to 32Gb microSD cards (I haven't tested anything larger and not necessary for the projects I'm working on currently). Make sure you are powering it with 5V, it will be recognized but will not read an SD card at 3.3v on the Pico or the Arduino Uno R4 Wifi. YMMV as others state that it will run at 3.3v, I was not able. Very easy to set up on the Arduino. On the Pico 2 W, the hardest part was finding the proper updated library - check out the micopython github, that is where I found mine. They have been doing some work on the sdcard library. I agree with others that have spoke about more documentation and advice would have been helpful for those who aren't as familiar with SPI protocol, SD card adapters, etc. as it does not come with any documentation. At all. Again, the Arduino side is head and shoulders ahead of the RPi side with these devices. The RPi side will have you scouring the Internet to find info on how to install it. Read the Arduino stuff, you will find many helpful hints there. Now I'm looking for more projects to use these on :)

Connected to SPI bus on Esp32. Worked nicely.

Works great! I had issues getting it to connect but I ended up fixing it in the code. Overall quality is really good. If you have simple pin connections it’s super easy to set up. I’ve used it with a raspberry pi pico and esp32 so I’m sure it could work on other controllers as well.

If you need memory for your project then an SD card adapter is often your best option and these adapters fit the bill for a pretty cheap price. They can operate on both 3.3 and 5v so no need to use voltage division or logic level shifters although you still might need that setup if this is just one device of several on an SPI bus. My only complaint is that more documentation and advice would have been helpful for those who aren't as familiar with SPI protocol, SD card adapters, etc which often seems to be a complaint about low cost SD card adapters.

3.3v pin didn’t work for me and I connected to vbus, I believe it is 5.5v and it worked. It has a regulator so it doesn’t damage the device and works perfectly.

(edited) These work great with CircuitPython, not Micropython: Hardware Compatibility |Board|Status|Notes |Waveshare RP2350-Plus|✅✅✅Flawless|up to 12MHZ SPI| |ESP32-S3 DevKitC|✅|✅Very Good|up to 12MHZ SPI|| |ESP32 Feather Huzzah|✅|✅Very Good|Up to 8MHz SPI| Get the Random-Nerd-Tutorials sdcard.py and it's plug and play! I ONLY got these working with 5V! (external or via the device like the waveshare rp2350)

Out of the box, these do NOT work for MPLAB PiC projects. The SD card holder should go directly to the MISO header. In this design, the MISO go through the 3.3V buffer which blocks the DATA. The On-line fix did NOT work for me. Also one of the boards had a capacitor broken off (C3) the voltage regulator circuit. Look for a better quality product. See photo

Great cheap option. They worked as designed