Carol,

I write about OneDrive in Chapter 6 – page 89 in the book. That is about setting OneDrive to automatically upload all the photos from your phone to OneDrive. I have that turned on as well as the Google Photos backup, so every picture I take is copied to both Google Photos and OneDrive. I’ve been doing that for years, so the majority of my photos are in both places.

I think you’re asking how to copy your entire Google Photos library over to OneDrive – that’s not so easy. I personally have never done it, but I know there are several possible methods:

1. Manual method: Download, then upload. I would make an album in Google Photos for every year’s worth of photos. Then select one album, click 3-dot menu and Download all. This will make a .zip file for all the photos/videos in the album. You’ll need to unzip the file (right-click, Extract All) to get a folder with all the photos and videos. Make sure that folder is within the OneDrive folder on your computer, and it will automatically be uploaded to your OneDrive account.
2. Takeout.google.com: Takeout is the Google Utility to get a copy of all your data stored on Google Servers. In addition to simply downloading your Google Photos to your computer, there is an option to copy them over to OneDrive instead. You need to give Google permission to access your OneDrive account. After selecting Google Photos in the takeout process, click on the button for All Photo Albums and deselect all. Then scroll down till you see “Photos for 2010, Photos for 2011” etc. and select each year of photos you want. Click OK. Scroll all the way down to “Next Step” Click where it says to Send download link via email and change that to “Add to OneDrive” Then Link accounts and Create Export. You will get an email when it is done. Try this first with just one album of photos, I’m not sure if they have fixed some of the problems I experienced last time I tried to use it. See book, pages 93-94.
3. 3d party software. I’ve heard good things about 2 websites that claim to be able to transfer between cloud accounts like Google Photos and OneDrive. I haven’t actually used them so can’t vouch. See book page 49.

   PicBackMan.com: This is a 3d party software. If you have more than 500 photos, you will need to pay for it. I have heard some good reports about this utility. I have not used it personally, so I can’t vouch for it. Here’s their help page on migrating Google PHotos to OneDrive.

   MultCloud.com: Here is their support page on moving photos from one cloud to another, including Google Photos and OneDrive.

I know that was long … let me review your specific questions:

 I don’t seem able to find the upload button on One Drive, after I have selected the photos on Google: there is no “select in Google Photos and Upload to OneDrive” process. 

Do I download ALL google photos (of which there are many) onto the computer, than upload to One Drive? Yes. If OneDrive is set up on your computer, you only need to download from Google Photos to a subfolder of the OneDrive folder, then they will automatically go to OneDrive. If not set up then you need to go to https://onedrive.live.com/, click on Photos and then the + in upper right to see the Upload button.

I then want to upload DVDs (old home movies) to both Google Photos and One Drive. Home movies are probably not in .mp4 format. You need to send them to a service – like thru Walgreens. I think they have the option to automatically save to your Google Photos. They actually send your DVDs and VHS Tapes out to Yes Video. See page 56 in the book. 

Let me know how it goes.