Is a new PC needed?

[A_Camera]

I would start with buying a 2TB SSD and more RAM. But... 72 hours non-stop cutting... that's a long time and requires just about everything to be perfectly reliable, so maybe a new PC is well motivated. Nevertheless, you'll need a lot of RAM and I personally never going to buy any other HD than SSD. I remember when I bought my first one it was like day and night... A new computer, run significantly faster.

But... I would ask CNCdrive support for advice on such large file. I don't know if it has any limits.