Well, if you are taking home backup drives, I guess you are also riding a horse-drawn buggy to work (smiley face). Yes, that’s sarcasm. That thing that you are taking home has a bunch of data on it that after about 6 months will experience data-creep (where some 0’s and 1’s will demagnetize and mush around, making the chance of the data stored on there less and less viable. So put your data in the cloud. A good strategy is to take all data 5 years or older and send it to Amazon Glacier and put all the newer data into your cloud backup strategy. And for goodness sake, get rid of the external drive.
Why do I take this thing home every weekend. Can’t we put our data in the cloud?