I made a post about this issue herehttps://plus.google.com/+marim_peace_be_with_you/posts/heyRFXw87GA
And +Naturpunkt by Gina M.
let me know about Chrome extension app at the comment column of this my post.
She recovered her Classic Google+ Photos
albums and it's full functions using this extension app.
And I tried that app and most of my Classic Google+ Photos
pages are recovered but I can't reach my Classic Albums and Classic Bins pages.
And +Merle Nienhuis
said he recovered his albums and functions using Picasa web albums and Picasa app.
By the way,
Can you see the column for making posts on your Profile page asYourself
of Classic G+ (at the top of page).
If you can see the column, you can share a photo using this column function.
Then see posted post in your stream, them click photo,
then you can see it on the detailed page.
Then you can see there is the button, "Add to album"
, press it. then you can see the many of your albums and you can make new one,
then you can add other photos from your computer.
I haven't tried this way so far. But I can see the buttons so I guess I can do it with this way.
Recently I posted my photos via that posting column on Classic Yourself
profile page. and while I posted via New Photos
page. Both way work for me so far.
And while there is another the way to share set of photos. That is Collection. Very easy to use.
Or if you have very old album that is not so important for you, you can add your new photos to that album and remove old photos then you can share it with public. And I guess that album has the button "Add to album". then you can create new album using that function.
I hope some of these way will work for you!!
(^ v ^)/ Don't worry, be happy!! Have a happy day in the last week of this year and A Very Happy New Year!!
(^ v ^)/"