It seems like you are encountering issues with your DSU sideloader installation despite having rooted your device and setting the maximum size of the Gigabytes. Here are some troubleshooting steps you can try to resolve the loading screen issue:
1. Check Compatibility: Ensure that the files you are sideloading are compatible with your device. Using incompatible files can lead to the device getting stuck on the loading screen.
2. Storage Space: If you suspect that storage space might be the issue, you can try clearing some space on your device or using smaller files for sideloading.
3. Recovery Mode: You can try booting into recovery mode on your device and clearing the cache partition. This can sometimes resolve issues with the device getting stuck on the loading screen.
4. Factory Reset: As a last resort, you can perform a factory reset on your device. This will erase all data on your device, so make sure to back up important files before proceeding.
5. Seek Help: If you are still facing issues, you can reach out to the DSU sideloader community or forums for assistance. They may have more specific troubleshooting steps based on the device you are using.
Remember to proceed with caution when making changes to your device, especially when performing a factory reset. If you are unsure about any step, it's always best to seek help from experienced users or professionals to avoid further complications.