Once you have downloaded the Farm Inventory tool (Rencore.SPTransformator.FarmInventory.exe) you will need to create a new folder on your Farm server and place the .exe into the folder.
Once you have started the tool you will be prompted to accept the End-User License Agreement (EULA). Please make sure you read these first, before clicking "Accept".
After accepting the EULA the following screen will appear. Click on the sentence to select a specific content database, else the tool will scan all content databases.
Tag the databases that you want to scan and click "Ok" to return to the previous screen.
Remember the more you tick the larger the file and the slower the process will be.
Click "Start Inventory" to begin the scan of the selected databases.
A progress bar will appear displaying the time taken and the current items being scanned.
Once the scan has been completed it will display the summary screen giving the size of the .SPTFinventory file, which you will need to save locally and open with SPTransformator to perform a Farm Analysis.