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Thanking to this answer I discovered ADS (Alternate Data Streams) and started to play some demo: created a test.txt:hidden file with hidden in ADS content. I can see from the same PC where I created it, but when I am copying it over network - hidden content is lost.

Both PC are on Win7x64, target drives are NTFS, connected via Team Viewer VPN (tried both RDP and Share copying - result the same: hidden content is lost)

Is ADS content persistent when copying over network in generally? If Yes Why in my case content may be lost?

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up vote 2 down vote accepted

I'd gather that Team Viewer stripped it out. I copied several files but without using Teamviewer and the ADS were copied over.

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I tried it via Gmail too - the same result. Will try tomorrow on real network. – ALZ Jan 26 '14 at 10:46
Checked it on real network - it works. – ALZ Jan 27 '14 at 9:26
btw, Skype also cuts ADS – ALZ Jan 27 '14 at 12:03
It makes sense for them to strip it out. There is no guarantee that the destination file system will support ADS. – surfasb Jan 28 '14 at 0:46

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