Windows 10: Upgrade C Drive 500GB SSD to 1 or 2TB SSD?

If I take my pc into my local pc man and ask him to do the above, can he guarantee crossing over ALL the data on the current drive. There is so much on there I don't want to lose anything and I don't trust restore or suchlike as its never been good to me in the past. Looking at ideas really to help me decide on course of action.

:)

 

Upgraded from 500GB SSD to 1TB SSD

Just finished swapping out my Samsung EVO 860 500GB SSD for a new Samsung QVO 860 1TB SSD on my Lenovo Ideacenter K450. Took about 1.5 hours start to finish.

1. Macrium incremental backup of existing 500GB SSD.
2. Swapped drives.
3. Clean install to 1TB SSD (to get new partition layout with 1909).
4. Booted Kyhi Rescue flash drive and ran Macrium to restore only the C: partition of the 500GB backup to the C: partition of the 1TB C: partition.
5. Ran Macrium's Fix Windows Boot Problems tool.
6. Shutdown, removed flash drive, powered up and system booted with no problems.
7. Ran Minitool Partition Wizard to expand C: to use the rest of the now unused 1TB drive.
Done. Rebooted and all is well except I now have an additional 500B of free space on my C: partition.

My drive 1 now looks like this:

 

what problems would encounter by replacing a standard hard drive with SSD. Current drive is 2TB with C drive only using 65.3GB. Would update to1TB SSD

What problems would encounter by upgrading 2TB standard HD to a 1TB SSD? Currently OS (C drive is using 65.3 GB

 

Upgraded from 500GB SSD to 1TB SSD

What about unallocated partition at end of drive ? Don't all Samsung drives need it for load leveling and longer life ?