Re-reading this, ne thing I noticed was you said you 'had a ton of crops following you' and this might be the issue. When asking to put something into storage, it scans and finds a set number of items closest to it. If you have many items that can not be stored in that particular storage unit, it can see all those first and so gives up. The way I get around that is to click on the items I'm trying to store so they go to the ground, then I move away so those items are closest.

Hope that makes sense!

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