WD 8TB My Cloud EX2 Ultra NAS - Network Attached Storage - Dual-Core Processor (WDBVBZ0080JCH-NESN)

The overall product is great, I've used WD for years and am very happy with the quality. However, I only gave 4 stars because the drag and drop action from a Windows computer does not identify duplicate file names in OS5. Instead, the MyCould automatically adds a _1 to the end of the file name of the newly added file with the same name as one that already existed on the drive. In OS3, a message would ask if you wanted to skip or overwrite the existing file. In OS5 that doesn't happen. So the user is forced to delete the existing file from the drive before uploading one with the same name in order to keep the files organized and not create duplicates with varying names on the drive. Hopefully this is fixed in a future release.

I bought this to replace a MyCloudMirror that does not support OS5. I tried to copy the Mirror to the EX and was disappointed in finding certain files whose names were not supported by the new OS. As a result I spent almost 36 hours to transfer 1.5TB. Also the EX automatically sets up as a two drive clone. Therefore the useful disk size is half of what you buy.