Originally Posted by
Manfred M
Your built in reader is likely the problem; they tend to be USB 2 compatible.
To reach those speeds you will need an external reader USB 3 reader and use a USB 3 port, assuming your computer has one. Most modern computers have a mix of USB 2 and 3 ports. If I accidentally plug my card reader into a USB 2 port on my laptop the downloads take forever. I throw it into a USB 3 and I get great speeds. Unfortunately, externally the USB 2 and USB 3 ports look identical, so you'll have to check your manual.
My desktop has plenty of USB 3 ports so I leave my Lexar USB 3.0 reader permanently plugged into the port. It just simplifies the whole download process.
The other change I made is that my desktop has a very fast M.2 SSD drive, so I download to it, rather than my slower main drive (which is a standard SSD) or the mechanical hard drives that I use for long-term storage.