Storage Monitor (Go)

A lightweight Go program that displays storage usage across multiple devices — including Android, tablets, and ZyXEL NAS systems — with automatic detection of USB drives connected to ZyXEL NAS (/e-data).

This project preserves the original code structure while extending it with dynamic USB detection on ZyXEL devices running FFP (fonz_fun_plug).

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📦 Features

• Displays formatted storage information for:
  • Redmi internal and SD card paths
  • Android tablet storage
  • ZyXEL NAS RAID volumes (/dev/md0, /dev/md1)
  • Automatically detected USB drives in /e-data
• Uses df to gather disk stats (works on Linux and embedded NAS systems)
• Shows color-coded bar charts with usage percentage
• Designed to run on low-resource environments (ARMv5 ZyXEL NAS)
• ANSI color support for clean, readable terminal output

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🧠 How It Works

1. A static list of known storage paths is defined (Android + ZyXEL HDDs).
2. The function detectZyXELUSB() lists the /e-data directory to find all connected USB devices automatically.
3. Each found mount is appended to the main storage list.
4. For each storage path, df is executed to retrieve capacity and usage data.
5. The information is displayed as a colored usage bar and numerical summary.

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⚙️ Requirements

• Go 1.19+
• Works on:
  • Linux (x86 / ARM / ARMv5 / ARMv7)
  • Android (via Termux)
  • ZyXEL NAS with FFP (fonz_fun_plug)

Ensure that:

• /e-data exists (for ZyXEL USB devices)
• df and ls commands are available in your system PATH

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🚀 Usage

Run directly:

go run main.go

Build binary:

go build -o storage main.go

Run the binary:

./storage


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📁 Directory Detection Logic (ZyXEL USB)

The ZyXEL USB devices are mounted under /e-data/ with directories named after the device UUID or label.
For example:

/e-data/af5af4bc-aed3-4497-9663-9e2c60bbd5cb
/e-data/68E0-DADB

The program dynamically lists these entries and adds them to the monitored storages list, labeling them as USB: <directory>.


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🧩 Future Enhancements

Auto-detect USB labels via blkid

Shorten UUID display (e.g., USB: af5af)

Include network mounts (/mnt/nfs, /mnt/smb)

JSON output mode for integration with dashboards



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🧑‍💻 Author

Jonáš Nedvědický (PhateValleyman)
Maintained as part of embedded utilities for ARM-based systems.


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