For JTAG (boundary-scan) repairs, you still need the box. But for 95% of eMMC data recovery and partition management tasks, the box is redundant.
Android devices store their user data (contacts, SMS, passwords, media) within Linux . Standard Windows tools cannot read these files directly. The eMMC File Manager acts as a dedicated "bridge," allowing you to mount, browse, and extract files from these Linux file systems on your Windows PC. z3x easy jtag emmc file manager without box upd