Note: if you measure slow speed, this is not the fault of the app. This is the reality of your phone.
Common reasons: fake sd card, slow sd card reader/hardware problems of the phone, software problems.
Easy to use even for beginners. Quick tests.
* Measure the speed of your external (removable) SD card
* Measure the speed of your internal storage
* Read/write tests, several different settings.
You can donate by buying the SD Card Test Pro - make a donation from the application or visit the Google Play site of SD Card Test Pro: https://play.google.com/store/apps/details?id=com.pzolee.sdcardtesterpro