Unlock Samsung S2 Portable 1TB

SOURCE: Samsung S2 - 1TB USB

It's hard to say from your description what the problem is but the first thing to do is determine the condition of the drive. You can check if there are problems with the drive using the free trial version of http://www.hdtune.com/

If it checks out ok then you can try to recover your data with Recuva it's free http://www.piriform.com/recuva

Or if you need data recovery help this a good choice for low cost and fast data recovery. All data recovery work is performed remotely over the Internet from a boot cd that you download and the best part is they just ask for donations if you are happy with the results: http://FreeDataRecovery.us

SOURCE: i am trying to install my 1tb s2 samsung potable

external HDD are plug and play devices and will be recognized automatically, the problem detecting large capacity drives like this relies on what type of hardware you are using (laptop itself). what I am trying to point is that old laptop only recognize lower capacity drives and thus have this issue.
but if you are using the latest hardwares and OS, just let me know so that i can pin point the problem.

SOURCE: Samsung S2 Portable no longer detected

same problem here, started happening just yesterday and now it's just flashing and is never detected.. I've tried emailing the Samsung support, will tell you if I receive any useful answer (as proposed by the very helpful person at http://www.fixya.com/support/t8050821-dear_fixya_trouble )

SOURCE: Samsung S2 1TB Hard Drive on my mac?

settings issue but more importantly the drive must be formatted for a mac. if that has not been done then that's what's on order.

back up data first though