Use the best SD card testing tool! Test the speed of internal or external storage!
No Ads!
+ Measure the speed of your external (removable) SD card
+ Measure the speed of your internal storage
+ Verify written data: detection of bad or fake cards
+ Read / write tests using several different combinations.
+ Custom benchmarks
+ Detecting storage type and class
+ Supports various file systems like ext4, exFAT or FAT / FAT32.
+ Supports portable and adoptable storage too