In an apparent attempt to raise more revenue Flickr picture hosting service is removing content from free accounts. 

"If your free account contains any moderate or restricted images after this date, those images will be considered a violation of our terms of service and subject to removal. Accounts found in violation of our limits will need to either subscribe to Flickr Pro or remove the content in violation."
"For these purposes, moderate content is defined as images containing partial nudity, like bare breasts and bottoms. Restricted content is defined as images containing full-frontal nudity or sexual acts."

Many of you have Flickr accounts with thong pictures and this will directly affect you.
For more about this login to Flickr.  They do have a way to download all your Flickr photos in a batch.
        (1)  Hover over You (Top left) and click on Camera Roll on the drop down list.
        (2)  Select the items you’d like to download (maximum 500).
        (3)  Notice it creates a banner along the bottom with thumbnails of the selected pictures. Under the thumbnails are various options including DOWNLOAD.  Click Download.
        Then select "Create .zip file".

Now you have a backup copy of your Flickr files checkout the following links for Paid and Free Flickr alternatives. 

https://www.makeuseof.com/tag/review-of-5-online-photo-sharing-sites-as-free-alternatives-to-flickr/

and  https://www.digitalgondola.com/best-flickr-alternatives-sites-like-flickr/