The modkit works fine on Windows 10 as long as you have the most recent version of it.

If you don't want to bother about making that mod yourself, Kralyerg made mods to expand storage of barns (and markets/tradeposts if I remember right) and stockpiles, including the ones in CC. Even if you don't use CC, that Ridiculous Storage mod will affect the vanilla barns.
I don't think that mod is on the workshop, but it's on the blackliquid team (team behind CC and MM) site : https://www.blackliquidsoftware.com/forum/Thread-Ridiculous-Storage. Need to register to get the mods.

Thanks for the reply. Did you mean the most recent version of Windows 10 or the modding kit? I'm running Mac OS Catalina with Bootcamp (Windows 10) and Banished Toolkit 1.0.7. FYI - my development experience has primarily been Unix, Mac OS and iOS. I have developed on Windows (mostly XP) using Java but I've never done much pure Windows development and what little I've done was a long time ago, so I feel a little lost when instructions start talking about Visual Studio Redist and DirectX End User Runtimes.
After installing the Toolkit and attempting to run BuildResources.bat I get an error dialog that MSVCR110.dll was not found. Is this related to the fact that I need to install the DirectX and Visual Studio 2012 Redist files? If so, where do I install them?

Oompf, I have no clue, I just beta-test the mods, I don't touch the modkit myself. I meant the last version of the modkit.

You might want to register on WorldOfBanished.com forum and ask your questions there. It's the forum managed by RedKetchup, and there's a bunch of other modders posting there. They have a prety solid "modding help" section if I remember correctly.

Thanks, great idea.

just google missing msvcr110.dll. download it. add it to the system32 folder. restart and your good to go

once the mod kit is up and running, it will take you 5 mins to change the script for storage barn space but there is a mod already on the workshop called storage stash, it raises it to like 30 000k or more.