Anti-spam is fine, but you should check your spam box. It's pretty easy to see which emails are legit as they have similar titles.

I've been running my site since 2005 and don't reply to take-downs unless they ask.

DtecNet is a bot by MarkMonitor. https://www.google.com/transparencyreport/removals/copyright/reporters/199/MarkMonitor-AntiPiracy/ They remove some 200,000-400,000 URLs a week. Don't ignore DMCA's unless you want to get in actual legal trouble. As you can see from the requests they represent the bi...

Did you upgrade straight from 1.9 to 2.2?

How experimental is the S3 integration? I'd love to test it out. Any information you can give about it? Does it integrate fully into XFS? e.g can files be transferred to it, multiple uploads etc.. Are there any any known issues with it currently? Is it hard coded to Amazon or can other S3 API file s...

You have to turn on direct links to limit the processes.

DMCA Accounts which can disable files for X weeks (for counter-notice purposes) before being purged. I believe in privacy of users so a file manager shouldn't be provided to agents, just the ability to disable the URL's they submit. Deleted files should not be deleted straight away but instead put i...

Most 100TB servers won't allow file hosts and you need way more storage.

Would probably be a good idea for the next version of XFS to put the files into a recycle bin of sorts with a fixed expire date (of the admins choosing). Good for DMCA counter-notices and files deleted by accident.

I'm using:
Adcash (banners)
RevenueHits (banners)
PropellerAds (pop-unders)

Always looking for better as the banners don't return anything significant.

No it won't, currently the second disk will be completely unused.

As above you need to set up a new fs on it and treat it as a new server with a different URL.

Have you confirmed the third server is working?, set it to read only in admin_servers and transfer a file within admin_files and test that way. Make sure the time zone is in sync with all other servers. You're correct in that all you need to do is copy the uploads folder and change the srv_id in MyS...

You have the option of limiting download links to a single IP which prevents the sharing of links with other users.

Secondly to force download you need to set the mime type to application/octet-stream. You can change the mime type of files in your web server config.

As ankurs has pointed out, single threaded downloads will require a datacenter with good BGP routing. No amount of settings will help here. You could build edge servers to geographically serve files from key points around the globe but this is going to up yours costs quite a bit and you'll need to h...

Depends on the port. If you go for 100MBps servers then you can use almost anything, Atom servers will use an entire 100MBps port no problems with 4 HDDs. Anything more than 100MBps and you'll need to up the CPU and RAM, I personally use the current generation Intel E3-1230 v2 in my 25TB file server...

Do you have a dedicated GBit link or an unmetered one? If you're not paying minimum $500 a month then you don't have a Gbit link and you can likely only burst it for short amounts of time and average 300-400MBps.