Check Flash is a small portable software program for Microsoft Windows operating systems that can be used to benchmark usb flashdrives. The application will automatically recognize connected removable media devices upon startup and provide the means to run benchmark tests to test their read and write speeds. It should be noted that the default test utilize the full storage space of the usb flashdrive having the effect that all data currently stored on the flash drive will be erased.
Some tests on the other hand – like the read stability test – will keep the existing data structure unharmed. Several different test modes are available including a full erase test. The test length can be selected as well ranging from one full cycle to a manual cycle selection, a burn it mode or until the first error has been found.
The application comes with several command line parameters that can be used to control the application from the command line or batch files. The parameters could be important if the removable drive is not properly identified by the software program. The /all switch will display all drives that are currently connected to the computer system making it easy to pick the removable devices that would not have been found otherwise.

Users should be aware though that the all parameter makes it possible to pick a hard drive for testing as well which can lead to data loss.
Check Flash is an excellent program to test the speeds of USB flashdrives. The program can be directly downloaded from the developers homepage and should run on most Windows operating systems.
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So it is better to backup all files from your thumbdrives before you proceed to benchmark them. How about SSD? Can it also do the benchmarking on the latest SSD drive?
This thing wiped one of my local HDD’s witht eh 3rd option – without running it with the /all parameter. I’m sure Check Flash showed me a 30GB USB drive yet it took my 250GB local HDD.
I’m running recovery tools now, fingers crossed. Sadly I haven’t backed up everything :(
sorry to hear about that, jelbo :(
after reading you comment, I’ve decided knowing my usb-pen’s speed isn’t that important anymore, Not if it wipes my PC!
– hope you got yours sorted