If your computer does not automatically install the driver via Windows Update, follow these manual steps: Microsoft Update Catalog
If the device is mass storage compliant (shows up as a drive letter but NOT as a portable device), Windows may recognize it without additional drivers. Only install the ATJ2259C driver if:
The driver stack manages charging the device's battery directly through the USB port while connected to a host PC. Tianocore-Docs Technical Chip Capabilities Integrated Interface:
Q: Why do I need the ATJ2259C USB driver? A: You need the ATJ2259C USB driver to enable communication between your computer and devices that use the ATJ2259C chip.
Disclaimer: This guide is for informational purposes only. The ATJ2259C driver is property of Actions Semiconductor. Always back up your data before installing legacy drivers.
The ATJ2259C chipset has a hard limit of 32GB for external SD cards. It does not support exFAT formatting. Format any card larger than 32GB to FAT32 (using third-party tools like guiformat), but expect stability issues.