Where to store Blobs?

Some days ago I asked "Where **not** to use PostgreSQL?" on this mailing list.

Now I realized: Nobody talked about Blobs.

I guess most people do not store Blobs in PostgresSQL.

Where do you store Blobs?

(In my case Blobs are PDF/image files with size up to 20 MByte.
I do not talk about very big blobs which are several hundret MByte)



-- 
Thomas Guettler http://www.thomas-guettler.de/
I am looking for feedback: https://github.com/guettli/programming-guidelines