My icloud and iphone storage are full with about 5,000 photos.  If I delete from either, I lose them all.  I need to save all my photos to my PC or SOMETHING to save them.  Then I want to delete photos from my iphone.  I used to be able to plug my iphone into my laptop.  It automatically backed all the photos up into a file with the date of the download.  Not ideal, but it is something.  

I recently downloaded Windows 10.  When I try to back up the photos, it only backs up one random photo saying it is the only new photo. 

1.  How can I get the PC to recognize that there are more than 5000 pics to download?

2.  How do I get it to download them?

3.  Is there a better solution?  I tried OneDrive, but it is only uploading certain pictures - only 452 of the 5000+.

Can anyone give me a step-by-step tutorial on the best and easiest way to handle this problem?

Thank you VERY MUCH!!!