Check SD card writing and reading speed. You need at least 200MB free space on your SD card.
Use the opportunity to download the installer of SD Speed Tester 1.1 free of charge and read users' reviews on Droid Informer. The app is designed for Android 2.2 and higher. This application is totally secure to download. PolarBear soft is the developer of the tool that can be found in the Productivity category.
The latest release was on Dec 12, 2014 and SD Speed Tester was downloaded and installed by over 50K users. The app has the average rating 1.3 on Google Play. There are ads in this application.