Let me know if you need more details
1. To create a directory for each blog, using the blog ID. For example, all images for blog #25 are stored in directory images/blog25/. There will be a huge amount of sub-directories like this.
2. To store all the images in one directory but use the blog ID as a filename differentiator, such as images/25image001.jpg, images/25image002.jpg, etc.
Which would provide better performance for retrieval?
Or does it not make much difference either way?