[A] In order to download inventory master, go to reports module and search "Product".
[B] Now click on the "Product Price and Inventory" report, a pop up will show up. Choose the desired filter, for eg. if you want to download only buy type product then select "Buy" from the filter and click on "Generate Report".
[C] Now select the desired column which you want in an excel file and click on the "Download" button to download it in excel format.
Keywords - Download all items, how to download products