If updating a PS TV, you can use a USB flash drive. Create a folder named PSVITA , and inside that, a folder named UPDATE . Place the firmware file, renamed to PSVUPDAT.PUP , inside the UPDATE folder.
While the update preserved store access, it inadvertently caused issues for 3G models. Users reported that the update altered the GPS functionality on 3G-enabled Vitas. While the 3G data service had been dead for years (due to the shutdown of 3G networks globally), the GPS receiver inside the console was still used by some enthusiasts for homebrew mapping applications. The 3.74 update tweaked the location services, leading to mixed reports about GPS accuracy and functionality post-update. ps vita firmware 3.74 download
: Use Safe Mode (hold the Power button for 7 seconds from a powered-off state) and select Update System Software > Update from USB Storage Device PlayStation Key Features & Security Changes If updating a PS TV, you can use a USB flash drive