From my experience its better to split into smaller size, and plot each using GPU plotter. But don’t just plot directly in to each drive. I, my self had 4xSeagate 8TB Ext HDD USB+HUB, which takes more than 100hrs to plot each (don’t know why but it took me over 5days to plot just 1 drive).
What I do to get around this is I bought 2x500GB SSD, plot a 500GB plot file on one of them (actually its some thing like 465GB) which took me around 1.5-2hrs to plot and then copy to my designated Ext HDD, which also took a little more than an hour to copy. And while copying, I also start to plot the second SSD(with the nonce number continue from the first plot file), since the GPU is now available. By the time the copying is finished, the second plotting is almost finish, I would deleted the plot file in the first SSD and prepare to plot the third plot file. When the second plot file is finished and start copy to the designated Ext.HDD, I start plotting the third plot file on the first SSD. I do this so on ans so on until all my Ext,HDD are full, all plotted.
One clear benefit of this method is you can start mining, using Blago’s miner, immediately right after you finish copying your first plot file. You don’t need to wait for the whole drive to be plot. Furthermore, having many plot files in the same HDD doesn’t slow down the mining, at least not noticeable.
One TIP on this method is when you copy the plot file, don’t copy directly to plot folder right away (ie. \burst\plots) just copy to some other place on the designated drive, after finished then “move” to the plot folder (or cut and paste as you may call). That way Blago’s miner wouldn’t show any error if it read to the plot file when it wasn’t finish copying.
Second TIP, Its also a good idea to keep a log file, an Excel sheet of you will, to log the plot file name, size, first and last nonce number. That way if any plot file shows too many Bad DL, hence plot file maybe corrupt, you can just simply delete and re-plot only that plot file.
Good luck and Happy Bursting!