@tokyosilver you type the phrase exactly how it was given to you - normally like "boy girl cat dog" - i.e. with spaces between the words. There shouldn't be anything before the first word or after the last word. I've always just copied and pasted the string from a secure note in my password manager, and never had an issue.
Add a new storage folder with the new drive
remove the old storage folder
This will cause the host to move all of the data from the one drive to the other, gracefully handling any read errors and ignoring corrupted sectors while still salvaging everything it can that is not corrupt.
I'm not sure how well the network would hold up to a DDoS attack. It's a lot to attack 100+ hosts across 5 continents, but a lot of the hosts are pretty small, so maybe not too difficult. But also, the attack would need to be sustained for a full week, which is a lot harder. As Sia continues to grow, network-wide DDoS becomes increasingly unlikely, especially as more high powered hosts get added to the network.
Total File Contract Size refers to the size of all file contracts ever created on the Sia network. The number is also misleading anymore, because (due to off-chain optimization), large file contracts will often be represented on-chain as having 0 bytes.
@Taek well I'm glad it's not 4GB! I haven't uploaded any files. Only hosting. When the disk is idle (5-10% usage) Sia still uses about 25% of CPU. Not sure if this has any relevance, but there's about 233 GB of storage that's been used. I've also been running Storj to see how it compares and it does seem to be less CPU/RAM hungry than Sia. Although it's only using about 170GB of storage. So this might explain why. I can live with this issue for the time being, but not indefinitely! Let me know if there's any other info I can provide that will help. Good luck with the improvements!
@Taek: The SIA UI error upon start up.. Seems some files get corrupted. I was however able to recover the contracts and seem to continue to get files in the storage. It is not my own files - it is the files that I host I'm worried about - to loose collatteral on.. It is working now, but it will hap pen again in my setup up I'm sure... I have close to 300 contracts - so far I see no errors... :-) But really look forward to a self restoration feature, to not loose anytihg upon write/error, but again I'm worried on the hosting file side of things..