The maximum number of hard drives that can be installed in a PC is determined by a variety of elements, such as the motherboard's storage connectivity options, the type of PC case, the number of drive bays that may be used. The majority of contemporary desktop PCs can generally accommodate numerous hard drives. These are a few typical situations:
Single Hard Drive: The primary storage component of many PCs is a single hard drive, which is adequate for the majority of computer tasks..
Additional Internal Hard Drives: You can add more internal hard drives if your computer has several drive bays and the required power and data connectors. Some mid-tower or full-tower cases enable for expansion by supporting several hard drives.
External Hard Drives: PCs can also connect to external hard drives via USB, eSATA, or Thunderbolt ports. This allows for additional storage capacity without requiring internal hardware modifications. The number of external hard drives you can connect will depend on the available ports and the number of USB or other external connections.
RAID Configurations: Several hard drives can be combined into a single logical unit using a RAID (Redundant Array of Independent Disks) configuration, which offers advantages like improved performance or data redundancy. The RAID level and motherboard or RAID controller capabilities will determine how many hard drives can be handled in a RAID configuration.