Adafruit MicroSD Card Breakout Board+ [ADA254]

Using this for a project and I was worried that it wouldn't support my 32gb card (san disk) because some people online said it may not work. Well it worked for me and my use case. Super happy with it so far.

As always, Adafruit produces great parts with great documentation. I bought this as an emergency purchase having spent WAY too many hours fighting a design flaw in the generic Chinese branded Micro SD SPI Breakouts - namely that in a 5V system, they hold MISO high when not in use which blocks your bus. Swapped that part out for this one and it works just like it should. I wasted enough non-billable hours to buy a crate full of these.... I just might do that. And so should you. :)Google "SPI MISO Pin conflict" and pick the first Arduino forum result to learn more about why you should skip generic and buy this instead!

Overview: The module was functional. I was able to use the Adafruit website tutorial to understand the basics. I ran the example sketches, in the SD library, to show that the module was able to write to and read from a micro SD card.I own multiple Adafruit products - the ADA254 is solidly designed. The module uses the high(er) quality CD74HC4050M as the level shifter. The module's on-board LED illuminated during write operations.Soldering is required: this allows you to choose on which side to place the pins. The optimal side for breadboard-prototyping is not necessarily the best for your application.

They are doing that, what i had paid for.

Although there are cheaper MicroSD readers out there, the Adafruit model has excellent support. Coming at it from a place of general Arduino ignorance, it didn't take long to have my Uno reading and writing data to/from microSD cards. Less than an hour. Add another hour to figure out how to sync it to a Mega 2560.I've had it run nonstop for three days at a time twice now, recording environmental data, opening and closing files roughly twice a second (the code wasn't well optimised at the time), and it hasn't hiccuped once yet.

Initially I got an error saying the SD card wouldn’t initialize. Two issues: if the SD card is too big (mine was 32GB) it might not work with this. After replacing the SD card I went crazy trying to find a soldering/wiring error but the Arduino SPI output was the real culprit. Replaced that and it works fine

Good mechanics on the microSD connector. This is weak point for these modules and Adafruit has done a nice job of picking components. This is a "push in-push out" style connector that works easily with a variety of cards (I've had cards snap off on other adapters but these have worked fine through many insert/remove cycles on several projects). Arduino library support makes integration simple. Usual Adafruit documentation and examples are big pluses for this adapter in addition to its solid construction. I deducted one star because it was not offered with headers -- a trivial soldering job but I prefer to have the option of purchasing fully assembled & tested components when I know they'll be used for breadboard prototyping.

This SD card is a little pricey, but it is very solid. I use this to store music and the play through an MP3 module to a small speaker. It works as expected.