The final outcome depends entirely on the specific choices you make during the installation process, which are detailed in the sections below.
Programs, software, and applications that were installed on the drive or partition where the operating system is installed.
What you are installing (Windows 10, Windows 11, macOS, etc.)
If you have three identical 1TB Samsung SSDs, it is incredibly easy to delete a partition on the wrong drive. The installation media doesn't always label them as "Games" or "Work"; it labels them as Drive 0, Drive 1, and Drive 2 . does clean install wipe all drives exclusive
Note: If a secondary internal drive does not appear immediately, open , locate the drive, right-click it, and select Change Drive Letter and Paths to assign it a new letter (like D: or E:). Summary Table: What Gets Wiped vs. What Stays Safe Drive Type Connection Status Will it be wiped? Primary OS Drive (Target) Yes Everything is erased during formatting. Secondary Internal Drive No Safe, but carries a risk of user selection error. Secondary Internal Drive Disconnected No 100% safe. Completely isolated from the installer. External USB Drive No Safe, but can easily be misidentified in setup. External USB Drive No 100% safe.
The simplest and safest approach is to back up your data, physically disconnect secondary drives before beginning, and carefully follow the installation prompts. With proper preparation, you can enjoy the benefits of a fresh operating system without losing your valuable data on other drives.
However, there is a major catch: While your raw files (photos, videos, documents) on the D: drive will survive, any software or games installed there will likely stop working. This happens because the software registries and configuration files that used to live on the C: drive were deleted during the clean install. You will need to reinstall those programs. 3. External Drives and Network Storage The final outcome depends entirely on the specific
The impact on your drives depends on which installation path you take:
Do you know if your secondary drives are ? I can give you specific instructions for your exact setup.
If you accidentally select the wrong drive, delete the wrong partition, or choose to format all listed drives, you will lose your data. Distinguishing between multiple drives can be difficult on this screen because they are often identified only by their total size and unallocated space, rather than their volume names (like "Entertainment" or "Backup"). Step-by-Step Guide to Safeguarding Your Data The installation media doesn't always label them as
Before performing any clean installation on any operating system, backing up your data is the single most important step you can take. A clean install wipes the target drive, and while other drives should remain safe, accidents happen.
To ensure your secondary drives remain completely safe during a clean installation, follow these best practices.
The Difference Between Your System Drive and Secondary Drives
Insert the USB drive or DVD into your computer and restart it. Access the BIOS/UEFI settings to set the USB drive or DVD as the primary boot device.