Storage of a large number of image databases or file system

I am working on a project where we need to store a large number of images, say, about 10 million, so this is the best way to save images. The best way in terms of speed and efficiency. This is a web project, so image search should be quick.

• Database

  Saving images as base64 in the database.
    we are working on a nosql database.

• File system

  Make a unique identifier and save it in a folder.