Not used for anything but storage and libraries, but I purchased a Western Digital 1 TB USB 3.0 drive for about $89.00 [Canadian], 64.50 Euros about 2 years ago now.
Being USB 3.0, I'll bet it's plenty fast enough for what you want.
I have it divided into 3 partitions for different tasks, but I actually use SSDs for my programs & DAW recordings.
I think it's called Western Digital Book Essential or something like that. But it hasn't failed me yet.
I keep anything musical, VST, & DAW related on one partition solely as storage and archives.
I use another just for back ups.
They may be even cheaper now.