You won't get an error message. Your files will appear to be there, but when you try to open them, they will be corrupted or completely empty.
In the professional tech world, is actually a legitimate web protocol developed by Sage for integrating business applications. However, Sage has officially discontinued support for SData as of 2025. The "256GB Tool" likely just hijacked the name to sound more credible. SData-Tool-256GB-With-Latest-Version-Download-2023--Updated-
Once you exceed the actual physical capacity (e.g., you put 9GB of photos on an 8GB drive), the drive starts overwriting the oldest data to make room for the new. You won't get an error message
You cannot "download" hardware capacity. If you need 256GB of space, the only safe way to get it is to buy a physical 256GB drive from a reputable manufacturer. Sage/sdata-downloads - GitHub However, Sage has officially discontinued support for SData
Using such a tool is a recipe for data disaster. Here is what happens when you try to use that "extra" space: