This is a common question asked here at DigiKey. While we carry a wide variety of both Solid State Drives (SSD) and Hard Disk Drives (HHD), we do not carry any that are preloaded with operating software, such as Windows®. Here is a link to the SSDs and HDDs we have available.
Solid State Drives (SSDs), Hard Disk Drives (HDDs) | Electronic Components Distributor DigiKey
It is up to the consumer to select and install the operating system that best suits their application onto the SSD or HDD that they have chosen. Here is a link to the software we have available.
Software, Services | Electronic Components Distributor DigiKey
Please review the datasheets to ensure your selections will work for your application.