Shareaza

Every time I moved incomplete folder Shareaza could read incomplete files and resume them. But this time I changed my HDD and copied Incomplete folder to new HDD. Now Shareaza only shows file name and verification mark. All files are in zero progress. I made sure files are readable, previewing them using VLC.

Whats the reason? What can I do?

I suspect the same as you apparently did: a file access rights problem. Shareaza needs write access to the incompletes, so checking readability is not enough.

Yes there was a permission problem but didn't correct the problem.

I even copied incomplete to another computer.

Try creating a new folder at the same place you normally store files, copying the files there and setting Shareaza to use that folder for incompletes. That should remove most access permissions problems without needing to guess what the problem was. If that does not work, I can't even guess without more info. I simply have no idea what you mean with "verification marks".

Let me tell you whole the story:
I had a 120GB HDD which was faulty. It didn't corrupt data just used to stopped working sometimes. But yesterday it became more dangerous as it stopped Windows. So I got a new 500GB HDD and copied incomplete on it. Disconnected old HDD and ran Shareaza, changed incomplete from D:\Incomplete to E:\Shareaza\Incomplete (new location) then restarted Shareaza to read new folder. When started Shareaza only showed name of the dls and green line which indicates the part of dl which is verified. I started to merge using advance properties with incompletes. It was fine till I restarted Shareaza to see everything was OK, but it was like I didn't merge, all progress was gone again. I copied incomplete folder to my other PC and ran a Shareaza debug build on it. Again Shareaza couldn't detect progress. It was when I posted here and you told me to check privileges. I don't know why Windows made newly installed HDD read-only, and more strange that I was able to copy incomplete and other folders on it while my user account should haven't had write privilege by that time. Anyway I reconnected my old HDD and I'm downloading on it. It had letter F: when I connected it but Shareaza couldn't make preview of it. After investigation I found out Shareaza is using old path (D:\Incomplete) instead of new F:\Incomplete for previewing. So I changed drive letter to D: and everything was fine then.

What I guess now is everything may would be OK if privileges was right when I was merging and the other thing is Shareaza won't read incompletes correctly if their path is changed. But why?

Well, other people have had problems with this and it seems Shareaza does not (fully) set the privileges for folders it uses, so they end up using what they inherit from their parent. And the .SD files appear to contain the incomplete path. No idea why. Shareaza should change it automatically when the folder is moved (never had this problem myself), but guess the conversion failed in this case due to the other issues.

But again, is this path necessary? I mean we could simply remove it and we wouldn't have to change it in the first place, so no errors would occur at this piece of code (that is redundant anyway)...

Sure its possible to remove paths but needs more investigation.