is a device driver status shown in Windows Device Manager when a Qualcomm-based Android phone fails to boot into its operating system (Android) or even its fastboot/recovery mode. It indicates that the phone has entered Emergency Download Mode (EDL Mode) . QUSB : Qualcomm USB. BULK : A type of USB transfer.
Google typically recommends an out-of-warranty repair or replacement through an Authorized Repair Vendor because the fix often requires a motherboard replacement. Battery Drain Method: qusb bulk cid verified