The move comes as a result of Google's desire to combine all of their existing cloud storage solutions into one cohesive app, something they've wanted to do since July. Google's cloud storage platforms - Google Drive and Google Photos - are getting new desktop clients.
Users will simply migrate to the new 'Backup and Sync' application. What is happening is that the old version of the Drive sync client called “Drive for Mac/PC” will no longer be supported. If you use Google Drive mostly through a web browser or Photos via Android, you probably won’t notice any changes. Google Drive and Google Photos are not going anywhere. Update: On an earlier revision of this story, wording may have suggested that Google Drive was shutting down.