Microsoft is introducing ads into a free version of Office, which seemingly only lets users save to OneDrive.

In other news, LibreOffice is also free, doesn't have ads, and lets you save your documents wherever you want. I use it every day for my work. It is available here:

https://www.libreoffice.org/

Home | LibreOffice - Free and private office suite - Based on OpenOffice - Compatible with Microsoft

Free office suite – the evolution of OpenOffice. Compatible with Microsoft .doc, .docx, .xls, .xlsx, .ppt, .pptx. Updated regularly, community powered.

@neil LibreOffice is awesome. I have used it for years. I have used Microsoft office when I was in school and it was free for students. I hated one drive and how hard office pushed to save everything there. I like to keep things local.
@culper @neil, for what it is worth, I use MS 365 and Google Docs regularly because that's what my clients use. However, regardless of the platform, I have an extra step in my process. I save the document to the cloud, and then, when I am done, I save a copy to my local client folder. I have lost too many cloud-stored files to ignore the value of redundancy.