I was speed testing my old 2009 Time Capsule today to determine if I think I would benefit from an update. I don't know off the top of my head exactly which version it is, but it has gigabit ethernet. I tested by using a wired gigabit ethernet connection from a Mac on Mavericks using Black Magic disk test, and then using the exact same wired gigabit ethernet connection (just unplugged the cable from the Mac and plugged it into the PC) from my PC on Windows 8.1 using CrystalDiskMark. On the Mac, I was getting 25 MB/s write and 43 MB/s read. On the PC, I was getting 12 MB/s write and 22 MB/s read. The PC is the newer hardware, and--if anything--I was expecting it to be faster. Anybody have any ideas why it is so much faster on the Mac than on the PC? Or any suggestions for troubleshooting it to try to nail down the issue? Edit: Just had a thought. I understand that the format of a Network drive doesn't matter in terms of different operating systems being able to read/write to it. But I assume that my Time Capsule is formatted in some OSX format since, before today, I had never used it with anything other than an Apple computer. It shows up and I can read/write to it from Windows, but maybe the formatting is not optimized for Windows. Could that potentially explain the speed difference?