The most common cause of accidental data wiping is selecting the wrong drive during the partitioning phase. The Windows installation screen labels drives as Disk 0 Partition 1 , Disk 1 Partition 1 , and so on. If you have two drives of identical size (for example, two 1TB SSDs), it is incredibly easy to confuse your target boot drive with your secondary data storage drive. Confusing System Reserved Patches
If you select "Remove everything," Windows may offer an option to "delete files from all drives". If this is enabled, it will wipe every connected storage device. Potential Risks with Multiple Drives does clean install wipe all drives exclusive
When you boot from a USB stick to install Windows, the installer sees your computer as a collection of storage devices. It does not assume you want to destroy everything; it assumes you want a place to live. The most common cause of accidental data wiping
To understand why your secondary drives are usually safe, it helps to distinguish a clean install from other system recovery methods. Confusing System Reserved Patches If you select "Remove
A typical PC has multiple "volumes" (drives or partitions). For example:
On the partition screen, locate the drive number corresponding to your primary boot drive.