Data Analysis Utilities

Does anyone have recommendations for data storage analysis tools to monitor information about data I have stored on my TrueNAS instance?

I’m looking for something akin to WinDirStat on the Windows side, which provides a breakdown of space usage by directory along with stats about filetypes and sizes, but would track this sort of info for historical analysis.

I’m familiar with tools on the enterprise side that do this (EMC’s InsightIQ, Pure1 monitoring), but I’m wondering if there’s anything appropriate for home use out there. I perused the TrueNAS Applications but nothing jumped out at me.