best db to store files
database, nosql
Solution
If you want to make some queries or search by keywords into file contents, I'll recommend you ElasticSearch, also you can use Apache Solr.
If you need something more specific I would need more information
Problem
All, I need to store a large amount of files(few millions) in a database and I'm not sure which technology or database use. My first idea is use mongodb or no sql dB. Thanks