The culprit is ultraarc 3030. Download the ultraarc mods archive from the first post, and use ultraarc 3040. It works for windows 10.

I'd still stick with ultraarc mods ( 2410 ) most stable on all OS win7,8,10

I just told about the latest version, or else, 2410 is just fine

Can I upload these files to any other site?

Any glass black box support?

Anyone knows if it's possible to use standard freearc compression options like m1,m2,m3 etc?

Use the damn Standard FreeArc then mate..

No, not without the permission of the author..

What's the difference between ua mods and only ua?

Holy shit mate, don't get pissed for no reason.

It was just a question :D

Well you could use weak methods, you could use tor in place of lzma, no idea how it fares in terms of speed and ratio but it's worth a shot.

Anyways, I'm working on replacement of this tool.

Honestly i don't know what all of those methods are for and for what file types.

And this time better make a backup of the source on some external drive like a usb stick :D

This is possibly the best advice I have seen someone give you Razor. :D

An external drive or a USB stick is just as prone to failure like a Mechanical Hard Drive.

Things get much worse if you're dealing with a solid state drive, because these tend to fail without any prior warnings whatsoever.

A cloud storage is a more robust solution, but seeing where Razor's from, I don't think that's a viable solution for him either. Telkom charges a limb or two for unlimited bandwidth, if I recall correctly.

Pity Razor lives too far from me. Recovering data off of dead hard drives is just a matter of few hours for me. ;) Granted, if I can manage a donor drive that matches the model that failed on him.

^ you could also try Ubuntu it seems to sometimes also read HD that fail within windows.