If you go to send a file to your Inventor and it gets stuck at a certain percentage, over and over, no matter the file, you may be having this issue.

If the Inventor is setup and then sits idle for a while, it can fill its onboard memory with snapshots. You can confirm whether or not this is the case with your printer by going to BUILD and then looking at the internal storage available. It'll say X.XXGB , 6.8XGB (your total available memory may differ slightly).

If your first variable, the X.XXGB is something very small, like 0.5GB or less, you're suffering from this issue. This can be fixed by doing a manual firmware update on your inventor.