Ask ko lang kung anong OS ang gamit mo nung last na functioning properly ang touch pad mo.? Doon ka kumuha ng driver, yung mga old Dell laptops may mga ilang models na once upgraded to Windows 10, incompatible yung touch pad, pwede mo try yung win 7 and win 8 drivers.
Baka nag backup ka ng iso file dati, kung sure kang 64gb talaga iyan, i try mo yung SD formatter para bumalik yung dating size niya, otherwise baka defective na yang flash drive mo.