App: sdspeed check SD card photo
Developer: Michael Mustun
Genres: Dienst­programme, Foto und Video

sdspeed - check speed and integrity of your photography SD card
sdspeed is the only product that measure the read and write rate and testing every bit of your SD memory card you can trust with no "conflict of interest". sdspeed software to verify the integrity of a flash SD Card. 

Easy to use:
1. Insert SD Card
2. Choose and open main folder of your mounted SD Card, e.g. /Volumes/photos
3. Hit start
4. Wait for the test results

Great application! ***** (5 of 5 Stars), Oct 11, 2017
"[...] will be used as the boot disk on my Raspberry Pi 3 B which is being put into service as a local test/development Web server for testing CGI applications that will ultimately be run from my public blog. I found the app very easy to use and don’t doubt it’s speed results. [..]" - by James.Bartlett

"Easy to use and very useful **** (4 of 5 Stars) - Jan 21, 2017
Fast and easy, really useful to check your old or new (eBay bought) cards." - byHrc13

"Worked fine for me ***** (5 of 5 Stars) by IndyJones! - Sep 28, 2016
Running this app on a Macbook Pro Late 2013 running MacOS Sierra 10.12. The SDSpeed app (v3.0.1-9) had no issues and did exactly as advertised. Just a comment on the micro-SD card I tested : > Model: Silicon Power 128GB up to 75MB/s Read Transfer Speed MicroSDXC UHS-1 Class10 ($34.99 on Amazon) > Useable space reported by SDSpeed was 117.1GB (MacOS reported 125.8GB ExFAT) > Write speed was 15.56 MB/s (comfortably in the UHS-1 range) > Read speed was 54.98 MB/s (not quite the 75MB/s in the product specs)."

I got everything I needed. ***** (5 of 5 Stars)
So glad to get this program as needed a good Apple SD card tester. I will let my friends know too about this product as testing memory cards is a must these days. - H. from UK

Excellent SD card tester ***** (5 of 5 Stars)
Did exactly what I wanted and tested the speed of my SD and MicroSD cards, now I know which cards work best for large file usage like Dslr camera’s and GoPro cams. One on my cards seems to have been faulty and not going near as fast as the other of the exact brand of card, replacement is now on the way.
- S. from UK

Molto utile per la verifica delle card flash. ***** (5 of 5 Stars)
- R. from Italy

Are you looking for sd card speed test on a Mac, how to check speed of memory card, SD Card Speed Test, flash card read write test, how to check SD card speed or software to measure micro SD performance? Is your SD Flash Memory Card or USB Flash Drive fake? SD Card Speed Test  | Pen Drive, USB Flash Drive

1. Does an extensive write test
2. Does an extensive read test (checks if it can read every single bit back as it was originally written)

Can also be used for just to
* disable Spotlight on an SD-Card / Flash drive (Spotlight slows down your external flash drive and uses some space. sdspeed can remove those unwanted files for you also)

This little tool sdspeed let's you speed test your USB and SD Flash Drives Cards. There are many Flash Frauds and a need to fight them. This utility can check SD Flash Cards, USB Flash Drive, Pen Drive, Memory Stick. It does an extensive write and read test. So every single bit will be tested if it can be written and afterwards read back. It does this by test for Counterfeit or Fake USB flash drives, and check your USB Flash Drive for errors. It works basically with any USB memory device like USB harddisks.

Fake flash, data corruption from flash memory chips, class speed under performing, fake memory card, fake memory chips altered to lie about their true size (Hacked Memory). The black market is strong. More then 1,000,000 flash memory chips are "upgraded" and manipulated every month and many brand name manufacturers such as: SanDisk, Transcend, Sony, ADATA, Kingston Technologies, Lexar and RITEK have been impacted.

Release notes:
Fixed bug which crashed the app