I’d noticed that Explorer on my laptop was taking a good 60+ seconds to create a new folder, so I Googled the problem. I found all sorts of solutions requiring all sorts of techie knowhow, but one seemed easy enough to test — someone reported that disconnecting their external hard drive solved the problem.
I didn’t have an external hard drive connected — or so I thought! However, I did have my camera connected via a USB port. It wasn’t on, just charging via the laptop. So I pulled out the USB cable connecting it to the laptop, and lo and behold, I could create a new folder with NO time lag!!
A simple fix in my case. And a super easy one to try before you get caught up in more complex solutions. I hope it works for you.