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Matt Cole

My little corner of the Internet

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Dear SanDisk, Please Do Better: An Open Letter

I ve been doing endurance testing on microSD cards for 2 1/2 years now. I ve gotten coverage in publications such as TechRadar, TechSpot, Tom s Hardware, IGN, and numerous social media posts. I ve destroyed over 150 cards from over 30 different brands and I have over 100 cards from 30 different brands that are going through Continue reading "Dear SanDisk, Please Do Better: An Open Letter"

What’s In A Name?

When it comes to my ongoing project, The Great MicroSD Card Survey, I ve been categorizing my cards into one of three groups: The intent was that name-brand cards would be those cards that came from well-known, reputable manufacturers; off-brand cards would be those cards that came from less well-known manufacturers; and knockoff cards would be Continue reading "What s In A Name?"

The Great MicroSD Card Survey: Two Years Later

On July 27, 2023, I ordered my first batch of microSD cards from AliExpress: three Kioxia Exceria G2 32GB s, a Kodak Ultra Performance 32GB (the gold version), three Hiksemi NEO 8GB s, two Hiksemi NEO 32GB s, three Microdrive 16GB s (yes, the ones with the Bart Simpson design on them), three SanDisk Ultra 32GB s, a Sansumg PRO Continue reading "The Great MicroSD Card Survey: Two Years Later"

The Great MicroSD Card Survey: One Year Later

It s been exactly one year since I started this project. I ve set up 8 machines with close to 70 card readers running around the clock. I m writing 101 terabytes of data per day. I ve written 18 petabytes of data to 181 microSD cards and destroyed 51 of them. Don t believe me? Check out my graveyard: Continue reading "The Great MicroSD Card Survey: One Year Later"

SD Card Manufacturer IDs

If you ve been following my microSD Card Survey, you might have noticed that I publish manufacturer IDs for (almost) all of the cards that I ve tested (save a few where they came DOA or where I tested them before I thought to dump the registers off the card). I know that there are other resources Continue reading "SD Card Manufacturer IDs"

I’m destroying a bunch of microSD cards. For science.

Today, I m posting the preliminary results of a project I ve been working on for the last six months now. For lack of a better name, I m calling it The Great microSD Card Survey. Think of it as the answer to such questions as just how good are microSD cards that you buy off of AliExpress? , Continue reading "I m destroying a bunch of microSD cards. For science."

PayPal Country Availability

Last updated: 3/28/2025 I get questions a lot about what PayPal users in any given country can do. Admittedly, PayPal doesn t do a very good job of advertising this. But hopefully, I can help shed some light on this. (There used to be a page you could access that would show you what PayPal supported Continue reading "PayPal Country Availability"

How I got a Ricoh Aficio MP C4502 Working on Mac OS X Mojave

Note: tl;dr at the end. I recently came into possession of a Lanier MP C4502 (which is, as far as I can tell, just a re-branded Ricoh Aficio MP C4502). Thank god for government surplus. I have a Macbook that I use for work, and I wanted to see if I could get it to Continue reading "How I got a Ricoh Aficio MP C4502 Working on Mac OS X Mojave"

Validating PayPal Webhooks Offline (Almost)

Update 4/9/2021: Now includes a Python example! PayPal offers the abillity for you to receive webhooks for transaction notifications. This isn t exactly new it was introduced with the REST APIs back in 2013(-ish?). But for those of you still using IPN, you should know that webhooks has some big advantages over IPN. First, webhooks Continue reading "Validating PayPal Webhooks Offline (Almost)"

Recurring Payments IPNs

I originally posted this article to x.com on August 3, 2010. Since that time, x.com has been repurposed, and my posts have been taken down. I have reposted this here for informational and historical purposes. (Updated 8/9/2010 to include recurring_payment_expired) There are several different values for the txn_type variable in an IPN message that are Continue reading "Recurring Payments IPNs"