It's not the card. Using Lexar 1000x with USB3 reader. It's very fast with just a windows explorer copy to the drive, but painfully slow using Lightroom import.My LR 4.4 is soooo sloowwww on import, that the program has become useless to me
I have about 50,000 images
Can you determine if its lightroom, or a card issue? Try copying image files to a folder on lightroom , and then importing them from that location. If still slow, then lightroom or the computer needs work. The lightroom catalog is a first target when there are issues, so rebuild it first.
Secondly, I'd create a new catalog for test purposes and import images into it to see how that works.
Then, I'd start checking my computer hardware, test the memory, test the hard drive, since one of those could be a issue. Be sure to install the latest video card drivers, they cause a huge amount of trouble.
Finally, reinstall Lightroom with a new catalog. if that fixes things, then switch to the old catalog and verify its working. Then remove the test catalogs.
My PC is fast for everything else. Core i7 920, 12GB RAM, Video card drivers up to date, hard drives work great for everything else.
I'll split the catalog and see what happens.