MI Flash tool is a software that is used to install MIUI firmware. Xiaomi’s recommended flash tool is secure, fast, and specifically made for all MI smartphones and tablets. Xiaomi tools are known to have a super supportive user interface that’s easy to workaround.
There is no storage issue because the package can be deleted after installation but is needed for a specific amount of time. The latest Mi Flash software is released every few months on MI official website with the new updates, installation guidelines, and technical specifications.
External such tools can often harm your device and even have integrated data collection systems to steal valuable personal information from the device.