@dk3d 

Personally I'm running P8 on a Linux and don't experience this problem, but I'll throw in a few comments anyway. 

I'm not convinced that you should be writing to a SD disk so much - typically SD cards have no wear-levelling built into them and so you run a big risk of ruining your SD card altogether. The individual cells on SD cards can only be re-written a certain number of times until they "wear out" and become marked as bad cells and can no longer be written to. It is not a problem in regular use, but  what you are exposing the SD card to, is not normal use. In fact it is the single most worst case for SD cards (lots and lots and lots of very small files).

An alternative solution would be a RAM drive. I'm pretty sure there are small and free applications for Windows that allow just the same thing - assigning a drive letter to be a "virtual drive" (ie. it totally exists in RAM, but Windows otherwise treats it just like a regular drive). You could then point IE to store temporary files in that virtual drive.