Everything looks good except the move from MBR to gpt. I do not even suggest moves when MBR to MBR as a reinstall is really easier and quicker. If your initial install uses a separate /home or separate /mnt/data partition you only need the system install on the SSD. If all data is in data partitions, you can back up the settings in /home easily as they are small. If you have the separate /home all you Linux data and user settings are in the /home and on the reinstall to the SSD you just install the system with Something Else or manual install and also mount but DO NOT format your existing /home.
Create the Windows partition(s) first, Windows needs a NTFS primary partition with the boot flag, then:
For the Total space you want for Ubuntu:
Ubuntu's standard install is just / (root) & swap, but it is better to add another partition for /home if allocating over 30GB.:
If gpt(not MBR) partitioning include these two first - all partitions with gpt are primary
250 MB efi FAT32 (for UEFI boot or future use for UEFI)
1 MB bios_grub no format (for BIOS boot)
Ubuntu partitions - smaller root only where hard drive space is limited.
If total space less than about 30GB just use / not separate /home or standard install.
1. 10-25 GB Mountpoint / primary or logical beginning ext4(or ext3)
2. all but 2 GB Mountpoint /home logical beginning ext4(or ext3)
3. 2 GB Mountpoint swap logical
Depending on how much memory you have you may not absolutely need swap but having some is still recommended. I do not hibernate (boots fast enough for me) but if hibernating then you need swap equal to RAM in GiB not GB. And if dual booting with windows a shared NTFS partition is also recommended. But you usually cannot create that as part of the install, just leave some space. Or partition in advance (recommended).
One advantage of partitioning in advance is that the installer will use the swap space to speed up the install. Thanks Herman for the tip.
https://help.ubuntu.com/community/DiskSpace
If you want to split /home into user settings only and data in separate data partition(s).
Splitting home directory discussion and details:
http://ubuntuforums.org/showthread.php?t=1811198
http://ubuntuforums.org/showthread.php?t=1901437
http://ubuntuforums.org/showthread.p...hlight=%2Fdata
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