I wonder if a plot by size chart would help you. Would it be it easier for people when they plot manually to look at the chart, select a configuration by the hard drive size. Leaving a% of free space for hard drive health. This would mean the experts have selected a plot size that best fits each drive. Later the person can optimize the plot to their machine.
For instance 1 TB Drive
1 plot(s) at 880 = 3604480
2 plot(s) at 440 gb each = 1802240
4 plot(s) at 220 gb each = 901120
wplotgenerator 12345678957898765432 0 3604480 4096 2
Having extra 10% space also allows you to install a copy of your favorite mining softwares with a wallet. On my external drives I install blago and solo mine or pool mine with my work laptop on the weekends.
Also use https://forums.burst-team.us/topic/348/plotschecker