I have an NVS2801+ with a Crucial MX500 drive (CT1000MX500SSD1) in it, f/w version 1.31.

When I try to copy files from an external USB card reader (Transcend TS-RDF8K), I consistently get an '0x00140020' error within the first few seconds.

The problem only happens with CF cards, SD cards transfer fine via the build-in slot, and via the same USB reader.

Cards are Sandisk Extreme 128GB and DMStorage DM38 Series 128GB.

Camera is a Canon 1DC, shooting 4K MJPEG files.

I have tried rolling back firmware to 1.30, but the problem persists.

I only use SD and CF cards, and not being able to offload the CF cards is a problem.

Thanks for your help.