Most business PCs come with a single hard drive that is more than enough for the average office user. However, a single drive may not be the ideal option for your staff in some circumstances, and you may want to buy additional drives for your workplace PCs.
- Increasing Storage Space
- Reducing Costs One Gig at a Time
- Multiple Drives and Redundancy
- Using Separate Hard Drives for Windows 10 and Data Storage
ref: https://smallbusiness.chron.com/raid-setting-bios-70341.html