Here I keep Acronis T.I. onhand for incremental backups when needed as well as grabbing full system images off of laptops and the old Vista case I got running again. That's a paid for program however unlike some of the freebies to choose from.
Here I keep a pair of Sata III drives(WD Black edition 1tb
) for storage and split up a second OS drive(Sata II model) to presently see a 100gb root and 10gb swap for a Linux distro with the remaining space on that 1tb drive used for images from the 7 host. Eventually I get into a pair of 2tb drives however.
When talking about large folders one folder here is much larger then your 160gb weighing in at a whopping 358gb! And yet that's not even the folder where I keep video captures that presently sees about 22.4gb on the main drive and 58.6gb on one of the storage drives with more being added to it.
As you can see you will want to shop for some bargains while the prices are down in order to get into one large enough for your actual needs. If you only expect to reach about 500gb for data then a 1tb drive will work since not only does it leave all that extra space but provides room to store a full system image or two as well. Why worry about only one folder when you can back up the entire drive in one shot?!