That GPT Disk looks very complex.
Probably you should install a third HDD 160GB at least to play with it.
Can't create more than 4 primary partitions.
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JacekJagosz I said convert on purpose. From what I googled it's possible to convert a full disk to basic.
Emperor What do you mean with the W10 HDD?
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Emperor And you're trying to install Solus on the GPT disk?
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[deleted] Yes I tried...I deleted one 128MB windows file, that was safe to remove, but I couldn't delete another 16MB file...but when I opened Gpartition it gave me the ability to delete that windows system file...big mistake-now I am running easeus Data Recovery, because I literately got an empty HDD 2....and it looks like it's finding a lot of old shit, that I deleted long time ago...I will have to spend some hours going trough this mess and hope everything is OK.
For now I had enough 
Later I may try again...
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Emperor Oh, condolences. Might be actually better to backup as much as possible and then start the HDD 2 from scratch.
[deleted] That's what I am doing-actually I don't think I had other choice-the only problem is to find if there is something missing and my main folder there was around 550GB...now it's 850GB...I will have to search manually not only to clean, but also because I have ,,only'' 650GB to put the restored data.
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@[deleted] @algent Well I've losted all data on HDD2...most of it was not important or I can re-download it, but the Lightroom catalog is gone. That being said I;ve got nothing to lose to install Solus there-even now it's recognizing it 
But I've got no idea how Linux handles files or folders.
Should I delete it and create partition only with Gparted...also are they gonna show up in windows like E drive or something? And how to create simply a large partition for pictures and videos that is easy to read/write by both Solus and Windows...Is that what they say to be /home? And if I want to resize it or create new partitions is it safe to do so from easeus(W10) or only from Gparted?
Is Linux OS going to appear in W10 like C drive or something?What about the swap.
After they are on separate disks I have to install another bootloader?
Update: after I imported the files in Lightroom it appears that the editing data is saved on DNG files...after I don't really care about that history it is safe to say that I saved 80% of the important information 
I can for sure recover at least 15% more of the important information, because I still have the torrents/names of the missing files...it will just take time...a lot of time and wi-fi
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Emperor To install linux you have to Format the partition with ext4 file system, and ext4 partitions are not vizible from Windows. If you need some HDD 2 space to be visible in both systems then i recommend you to create two partitions.
Assuming it is the sda drive.
One for linux Extended. This one can bi partitioned on four logical partitions.
On Linux side
(sda1) Extended
- (sda5) EFI with Fat32 File System around 512MB minimum i think (since you have UEFI system)
Here i can't help you how to mount it, because i don't have experience on UEFI systems.
Maybe it is /boot/efi. You have to do your research. - (sda6) Swap with linuxswap File System (if you need swap)
- (sda7) Root partition with ext4 File System (30 GB is enough), it depends how much are you going to install on it.
on sda7 you have to mount root point (/ ) - (sda8) Home Partition with ext4 File System (with remaining GB left from Extended partition)
on sda 8 you have to mount /home
And for Windows
(sda2) Primary with NTFS
PS, you can add other two primary partition if you want, their names will be sda3 and sda4 (Mas primary partitions are always 4, this is universal law as i know, it is not a linux thing or windows thing).
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algent Well why do i need Linux extended and primary partition?
I am installing on GPT drive, not MBR one. Also as I can see Solus prefers GPT(https://getsol.us/articles/installation/disks/en/)-so from the big disk HDD2 with GParted I have to:
1-Erase it to make emty space
2-Create a 512MB FAT32 partition with flags: boot and esp
3-I will create a root file / which I think to make around 150GB-well my programs will be there and I may play with virtual machines, so it will be a nice to have more space
4-I will create a swap partition(I have 16GB ram) so I will make it only 4-6 GB...also I will search to tweak the setting from 60 to 90-that means swap will be used when I use more than 90% of the available ram
5-I don't think I need /home-I mean from what I searched it's like Documents file for Windows-and I don't use them-there is only some programs data-which I would be happy to be on the main root partition-also neither Solus nor Ubuntu creates such a partition when you use them to automatically do the installation for you. But if there is a HUGE reason to install it-like I am at high risk of damaging the system after update or something I will use it.
6-I will create a NTFS partition with the remaining 1.5+ TB that from what I have read may have compatability issues with Linux??But it's the most modern so I hope it's safe. There I will have downloaded content and potentially some more valuable information.
Am I right or I shouldn't to this way?
Finally I wanna adress something-when using Solus on Virtual machine-I of course had put a simple to remember basic password-despite the problems with alphabetic letters-not switching to English when I was putting a name of the PC, which I later tweaked from the language settings, there are some password issues too!
When I turned the OS on and asked me for password I wrote it and I logged-when clicked to download the updates and asked me for password I used the same and I couldn't log it...neither with empty one...after being unactive Solus locks and wants password-again I can't log in. But I can only log in when turning the system on...I searched for the same problems but it was too complex-it was stated that this was a well known problem that would hopefully be adressed in Solus 4.1
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Emperor In my opinion it's correct. It's GPT, not MBR so no need to mess with extended partitions. If you don't make separate /home it will simply reside in root.
4) is incorrect as far as I know. Smaller swappiness rates will use the swap more sparsely, it's 10 on Solus by default.
Since you've got space, I'd consider making the root partition even bigger. Especially if you'll store VMs there.
For the password issue I'd say change your region/language before launching installer and try if it works that way. Check if this helps you https://discuss.getsol.us/d/241-dvorak-support-in-installer-and-at-boot-login
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Emperor Yeah, I just meant that you don't set the value to 90 in that case.
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[deleted] Yes about the password that is what I've read but didn't understand xD
As far as I remember when installing on VM I set the system language to English, but writing to BG, so I have to go fully English before installation? After I am done is it safe to change everything to BG?
And to be sure-making the big NTFS partition is safe and will be easily read/write via both W10 and Solus? Also the root and swap partitions would not be visible in W10, but the 1.5TB NTFS will appear ready to go in W10 automatically?
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Emperor Yeah, I guess performing the installation fully english and changing the stuff to BG after first boot would do. I recall the login screen should have an option to change the keyboard layout too.
Yeah, NTFS works in both Windows and Solus. I recall I went full EXT4 though due to NTFS being slower. Root and swap might be visible in W10 as raw or unallocated, but that's fine. Just don't format them if Windows offers you that. The NTFS should appear automatically, if it doesn't you can assign a drive letter to it via Disk Management.
[deleted] So after I want to use it both with W10 and Solus-I can't go with Ext4, but only with NTFS.
Also wanna know am I safe deleting 2 partitions-one is W10 for backup, but it's useless-I needed it once and it failed-can I delete that partition without W10 bugging or forcing creation of new one? Also can I delete the W10 bootloader after installing Solus? I think Linux bootloader can only check if there is W10 bootloader and use it for opening W10-thus meaning I need 2 bootloaders?