Functional Storage Downgrade Fix

This is a patch that fixes the conditions under which Functional Storage's Iron downgrade can be applied and prevents the item overstack bug.

130 Downloads

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About this Mod

Functional Storage Downgrade Fix (MC 1.20.1)

A small patch that fixes an item overstack issue in Functional Storage for Minecraft 1.20.1. This patch fixes the conditions under which the Functional Storage iron downgrade can be applied and prevents the item overstack bug.

Requirements

Minecraft 1.20.1
Functional Storage (1.20.1-1.2.10 or later)

LICENSE

Functional Storage is distributed under the MIT License.
The original license text can be found in LICENSE-FunctionalStorage.

Disclaimer

This project is an independent compatibility fix and is not affiliated with the original Functional Storage developers.

Available Versions

Functional Storage Downgrade Fix 1.2.0release

MC 1.20.1forge

March 10, 2026

How to Install Functional Storage Downgrade Fix on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.20.1).

Install Mod

Open the mod browser in the dashboard and search for "Functional Storage Downgrade Fix". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forge

Minecraft Versions

1.20.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Functional Storage Downgrade Fix server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.20.1). You can switch loaders with one click in the panel.

Is Functional Storage Downgrade Fix compatible with forge?

Functional Storage Downgrade Fix officially supports forge for Minecraft 1.20.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Functional Storage Downgrade Fix – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Functional Storage Downgrade Fix consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.