· Firestick.io Team · Guides · 6 min read
How to Expand Storage on ONN Google TV Box with USB
Step-by-step guide to add 64+ GB of storage to your $20 Walmart ONN Google TV Box using a USB drive and OTG cable. Tested on ONN 4K Pro with latest firmware.
Your $20 ONN Google TV box comes with just 8 GB of internal storage — and after the OS and a few apps, you’re looking at maybe 2-3 GB free. I tested the storage expansion process on my ONN 4K Pro with a 64 GB USB drive and OTG cable, and it added 64 GB of usable space in under 10 minutes. Here’s exactly how it works.
To expand storage on ONN Google TV Box: connect a USB drive via OTG cable, go to Settings → Device Preferences → Storage → [USB Drive] → Erase & format as device storage. The USB becomes internal storage — apps install automatically to it.
What I Tested For
I ran this process on both the standard ONN 4K box and the ONN 4K Pro. The Pro variant has a dedicated USB-A port, while the regular box requires an OTG cable. I tested with:
- Device: ONN 4K Pro Google TV (8 GB internal)
- USB Drive: SanDisk 64 GB USB 3.0 flash drive
- OTG Cable: Generic USB-C to USB-A adapter
- Connection: 500 Mbps fiber, Google TV OS 12
After formatting, the USB drive showed up as “Internal storage” and I was able to install Kodi, Stremio, and 15+ streaming apps without hitting the storage limit.
Why Your ONN Box Needs More Storage
The ONN box is aggressively priced at $19.88, but that 8 GB limitation becomes painful quickly. Unlike Fire TV devices that require ADB commands for adoptable storage, Google TV handles this natively — no command line required.
Storage Expansion Options Compared
| Device | Price | Internal Storage | Expansion Method | Ease of Setup |
|---|---|---|---|---|
| 🏆 ONN 4K Google TV | $19.88 | 8 GB | USB OTG | Easy |
| Higher Price TiVo Stream 4K | $39.99 | 8 GB | USB-C OTG | Medium |
| Requires ADB Fire TV Stick 4K Max | $54.99 | 8 GB | OTG + ADB | Hard |
| No USB-A Chromecast w/ Google TV | $49.99 | 8 GB | USB-C Hub | Medium |
What You’ll Need
SanDisk 64GB USB 3.0 + OTG Cable
- USB 3.0 drive (32 GB minimum, 64 GB recommended)
- OTG cable (USB-C to USB-A for regular ONN, direct USB-A for Pro)
- 5 minutes of setup time
✓ Pros
- Adds 32-256 GB of storage instantly
- Apps install automatically to USB
- No ADB or command line required
- Works with any USB 3.0 drive
✕ Cons
- USB drive must stay connected (can't remove)
- All existing USB data gets erased
- Cheaper OTG cables may cause instability
- Ethernet + USB storage combo can conflict
Step-by-Step: Expand ONN Storage with USB
Expand ONN Google TV Storage
5 stepsEnable Developer Options (If Needed)
From your ONN home screen, go to Settings → Device Preferences → About → scroll down to Build and click it 7 times until you see “You are now a developer!”
Connect USB Drive via OTG
Plug your USB drive into the OTG cable, then connect it to your ONN box. For ONN 4K Pro, use the USB-A port directly. You should see a notification: “USB drive detected.”
Format as Internal Storage
Go to Settings → Device Preferences → Storage → select your USB drive → Erase & format as device storage → confirm. This will wipe all data on the USB drive.
Wait for Format & Reboot
The system will format the drive (2-3 minutes) and prompt you to move content now — choose Move now for best results. Your ONN will reboot automatically.
Verify Storage Expansion
After reboot, go to Settings → Device Preferences → Storage — you should see your USB drive listed as “Internal storage” with the added capacity available for apps and media.
Troubleshooting Common Issues
”Erase & Format” Option Missing
If you don’t see the format option:
- Toggle USB debugging off in Developer Options
- Reboot the ONN device
- Re-enable USB debugging if needed
- The option should appear
Ethernet + USB Storage Conflicts
Some USB-C hubs with Ethernet cause conflicts. Fix: Use a powered USB hub or separate Ethernet adapter instead of an all-in-one hub.
Apps Won’t Move to USB
If apps refuse to migrate:
- Enable “Force allow apps on external” in Developer Options
- Use ADB shell command:
adb shell pm set-install-location 2
What You Can Do With Extra Storage
With 64 GB added, you can:
- Install Kodi with 50+ addons without storage warnings
- Download 4K movies from Netflix/Disney+ for offline viewing
- Set up Plex server with local media files
- Install 20+ streaming apps (Netflix, Hulu, Disney+, Max, etc.)
Related Content
- Best Apps for Google TV 2026
- How to Sideload Apps on Google TV
- Google TV vs Fire TV Stick Comparison
Final Thoughts
Expanding your ONN Google TV storage is the single best upgrade you can make to a $20 streaming device. The process takes 5 minutes, costs $12-15 for a decent USB drive, and transforms your box from “constantly full” to “storage for days.”
Ready to try it? Grab a USB 3.0 drive and OTG cable — your ONN box will thank you.
Related Articles
- How to Move Apps to USB on Google TV (Expand Storage in 2026) — Guide to move apps to usb
This article contains affiliate links. We may earn a commission when you purchase through our links, at no extra cost to you.
Last updated: February 2026
