On my C drive the blue ones make some sense but not to the total drive. My freespace on the C drive is 34.9gb on a 140gb drive. Relative Size I thought was a display of a folder's used size to drive size? The first folder should be about 29%? Also, I don't remember different colors.
The column doesn't work in This PC, but it's also not in the list of columns you can choose for This PC, since it's not intended to work. (The only way to turn it on there is via commands.)
I'm not sure what it's supposed to be telling me? I thought it was telling me free space to total disk but it just seems to be telling me the biggest to the smallest disk.
I tried looking it up in the online help but I couldn't find any reference to the definition of the Relative Size column at the This PC level (disk level).
The file level says it's a file size relative to the largest file on the disk. From what I see I would expect that really means within a given directory but it doesn't say that. If the largest file isn't in the current directory that could take quite a bit of work to uncover. I'm not sure why that would be something of value? It could be something that through the history of disk size's and speeds has become irrelvent? The file level has a Relative Size and a Relative Size on Disk which aren't really that different as you would expect we're talking about the file using complete disk sector's to save a file vs the actual file size.
To me, at the This PC level, used vs free makes the most sense. If 96% of a disk is used that's what I need to know and what disk has the largest available free space ie th shortest bar. I'm not sure if the bar should show free or used? I guess it could show both using a different color for each. It's one graph but just being tranparent seems less informational. I think there used to be a gradient used for the graphs as it got closer to full it would become more red.
It could be more useful...maybe some type of weighted average as a means to compare space across all drives because 90% on one drive is not relative to 90% on a different sized drive. I'm just spitballing here.
At the file level I'm not sure if I would see a need. There may be one I'm just not sure what it is supposed to represent?
BTW there's still that weird sort issue. It didn't come up right away in fact it took me going through adding columns trying to figure out what I was seeing and screen printing till it went whacky. I can't explain that.