1. How to save database on IDA Demo? Basically dumping database as IDC file & loading it as script does similar function as saving and loading an *.IDB file. - Saving: File -> Produce File -> Dump to IDC File - Loading: File -> Script File -> Open dumped IDC file 2. What to do when disassembling large binary files ? On average IDA takes about 30 minutes to disassemble a 10mb Android native shared library (*.so files), however once core game functions appear in the function name window there is no need to continue the analysis. To speed up your disassembling process, go to Options - General - Analysis - Enable/Disable to manually turn off analysis.