This feature allows the software to "mark" and logically isolate bad blocks it finds, preventing the operating system from attempting to write data to those defective areas, which can improve the overall stability of the drive.
If the drive is genuine, the test will complete successfully. If the drive is fake (expanded), the software will stop and show an error message, stating that the capacity is incorrect and that data will be lost. Features & Benefits
Because v2.42 is an older release, it may occasionally misinterpret the burst speeds of ultra-fast modern USB 3.2 Gen 2 or NVMe-based external enclosures. For pure speed benchmarking of modern drives, tools like CrystalDiskMark are preferred; however, MyDiskTest remains highly effective for capacity verification. mydisktest v242 portable
A progress bar will appear. Do not unplug the device until it finished. :
is a popular portable utility used primarily to identify "expansion" (fake) storage in USB flash drives, SD cards, and CF cards. It is a lightweight, non-destructive tool that helps verify if a drive’s actual capacity matches its advertised size. Core Functions This feature allows the software to "mark" and
: Green blocks typically indicate healthy sectors, while red blocks indicate damage or fake capacity.
While MyDiskTest v2.42 Portable remains an excellent choice, it is an older utility. Depending on your operating system or specific needs, you might also consider these widely used alternatives: Features & Benefits Because v2
Measures the real-world read and write speeds of your storage device.