Why are there two hard disk drives, ACER (C:) and ACERDATA (D:), on my computer?
The hard disk drive is partitioned into three partitions by design. The hard disk drive partitions are listed as ACER (C:) and ACERDATA (D:). The ACER (C:) partition is the primary partition, where the Operating System is located. The ACERDATA (D:) partition can be used as additional storage.
Note: The ACER (C:) partition is generally, by default, selected when new programs are installed.
In the event that an Acer eRecovery is performed on the machine, all data on the ACER (C:) partition will be reverted to the factory default settings and all data on the partition will be lost. Any data on the ACERDATA (D:) partition will not be erased.
There is also a third, hidden partition called PQSERVICE. The PQSERVICE partition contains the files necessary for the Acer eRecovery to reinstall the operating system, setting the system back to the way it was the day you purchased it, create recovery media, or reinstall drivers and applications
Your hard disk drive can be repartitioned into one larger partition, or several smaller ones. Doing so will require third party software. Acer does not provide software nor provide support for this process, or an issue which may arise from repartitioning the hard disk drive from the original factory partitions.
Note: Performing any partition modification can erase or corrupt data on the hard disk drive. Ensure you have backed up important data before modifying any partitions.