Re External DVD Drive/ copying problems

I am stumped trying to solve this

I am W8, have an LG external DVD writer on USB, the most recent driver for it is Windows 7, no W8 available on website

when I try to copy an MP4 to my hard drive, I get ‘there is not enough memory to complete this operation’ there’s no error code given , the ‘more’ button does not provide more detail…

searched LG, and Microsoft websites no answer,

either a windows problem, or driver for Lg drive is causing this, the drive copies MP3, wav’s ok, I have 16 gig of DDR4 ram!

totally stuck

Any Ideas anyone

got an internal one I’ll see if it removes the problem once installed