is tha fact, that my blockchaindata is on an external USB 2.0 drive.
As someone who has been maintaining the block chain constantly for 7 years now on multiple machines, I would personally suggest anyone dealing with block chain data use a SATA SSD at a minimum. Anything less is just asking for additional difficulty. It can work... sure, but don't expect it to be a smooth, or fast, experience.
The faster the storage, the better Core and Armory will work... from my layman's experience.
Ouch...
USB2 as well. If I remember right, that has a third the bandwidth of even a SATA I connection to play with - which itself is ancient. Might be the case that there is nothing
wrong with the config now, but scanning the 160+ GB blockchain for the transactions is just going to take a painfully long time.