I suggest you download the SysInspire NSF to PST converter tool, this is one of the best tools you can use for transferring Lotus Notes Email to Gmail. It has a Bulk conversion feature that can help you to do Bulk conversion of your NSF file. It has a feature of Export emails with attachments such as photos, calendar, contacts.etc. it has the PST split option where you can split your PST file in one click. This tool comes with free Download and free Deo version available, you can convert 25 files from each folder. It has technical support 24x7 you can get help on Email or Live chat.