how to use Blob datatype in Postgres

Question

I am using a Postgresql database in my rails application. To store large file or data in database I have used blob data type in MySql.

For Postgres which data type I

Answer 1

I think this is the most comprehensive answer on the PostgreSQL wiki itself: https://wiki.postgresql.org/wiki/BinaryFilesInDB

Read the part with the title 'What is the best way to store the files in the Database?'