File Size excessive from Premiere Rush

Thanks Kevin for replying. What I do not understand is that I start with a file that is about 60Mb, then do some minor editing in Rush (crop, trim etc.), and the exported file is well over 1Gb (1.6 from memory). I checked frame rate and made sure that whereas the original mp4 was 25 fps, the output was also 25. I had not changed resolution etc. etc. So did everything to ensure I wasnt inadvertantly exporting in a way that would radically increase the file size. If I editd that same source using something basic like the Windows 10 editor, or a WinX product, the output file remained pretty much the same size as the input file and the encoder and other parameters looked the same as what I selected in Rush.. I respect that Rush might be encoding differently, but if so then must surely be some way to get it to produce a similar size file, especially as it is a more powerful program and also considering Rush's target market. Looking at simialr comments in this community one person explicitly said that selecting software encoding fixed the issue, and I saw a second post confirming this (both Adobe Premiere Pro). Now technically this should not make a big difference as you say ...but it did, so the questions is why ? Something is going on. As to why I want smaller files, well obviously if I am sharing files I'd rather share 60Mb than 1.6Gb, especially when I started with 60Mb and made a few tweaks.