If you are looking for TV firmware, don't just search the model name. Open the back of the device and look for the Main Board Number (e.g., TP.MS338.PB801). Searching for this number + "firmware" is much more reliable than searching "Technostar Rio."
Use FAT32 formatting. A 4GB or 8GB drive is usually best for older smart devices. Download TECHNOSTAR RIO SMART rar
Technostar is a brand often associated with regional retailers (like Sharaf DG or European distributors). If you are looking for TV firmware, don't
Once you find the file, you'll need to prepare it for the device: Download TECHNOSTAR RIO SMART rar