Admittedly, I've got a big library. However, I've come to the end of what I can take off my 128GB Win8.1 Laptop and now can't free up enough space to complete an index. It will be a couple months before I can afford to upgrade to a 512GB Surface Pro 3...wish Samsung had offered a larger SSD when I bought this ATIV Book 9 Pro, as I love it's massive resolution screen (3,200 x 1,800) for Logos.
If you look at the drive space analysis graph below, the Logos index files are the large red (and long blue) blocks. While Logos says I need to free up at least 1 GB of space to complete an index, I suspect I need quite a bit more space than that ... the partial index files are about 20GB each.
Logos runs great on an SSD ... just go for the deep end of the pool when you first buy your machine, and get the biggest drive you can possibly find. Eventually, you will need it.
