How to Update Right Side to Match Left Side?

[fran_3]

Newbie here running a PC with Windows 10. I searched for answers before posting but ended up even more confused... so hopefully some kind soul will help me out here :-)

Question 1:
We want to make the Right Side identical to the Left Side.
We do not want to make _any_ changes to the Left Side.
In other words...
- If a file is on the Left but not the Right... copy it to the Right.
- If a file is newer on the Left... copy/overwrite the one on the Right
- If a file is on the Right but not on the Left... delete it on the Right
etc.

Reason: Main PC & Backup PC each with external USB hard drives... aka data disk.
The hard drive on the Main PC has content added, changed, and deleted all during the day.
At the end of the day the hard drive on the Backup PC gets connected to the Main PC and made to match the one on the Main PC... then reconnected to the backup PC.
We have been using another app to do this but wanted to learn how to do it with FreeFileSync.

Question 2:
In another case...
Comparing using Filenames only and ignoring date, time, size, content, etc....
How can we just see in the Left Panel... a list of files in the Left Folder that are not in the Right Folder.
And in the Right Panel... a list of files that are in the Right Folder but not in the Left Folder?
Alternately...
Only see files in the Left Folder that are different in date, time, size, or content than those in the Right Folder...
And vise-versa.

Thanks for any help.

[Plerry]

Q1: select the Mirror sync variant

Q2: In FreeFileSync (FFS) you can only select the Comparison variants (F6)
• File time and size
• File content
• File Size
So, you can not compare on Filename only.
However, FFS only compares identically named files in identical (sub)folders relative to the left and right base location.
Looking at your questions, I would suggest you to run Compare by File time and size while selecting a two-way sync (but do not actually run the sync ...)
> "How can we just see in the Left Panel... a list of files in the Left Folder that are not in the Right Folder."
Select (mid below the Compare results) to only "Show files that will be created on the right side" (The green right pointing arrow with a plus-sign)
> "And in the Right Panel... a list of files that are in the Right Folder but not in the Left Folder?"
Select (mid below the Compare results) to only"Show files that will be created on the left side" (The blue left pointing arrow with a plus-sign)
> "Only see files in the Left Folder that are different in date, time, size, or content than those in the Right Folder..."
Select (mid below the Compare results) to only "Show files that will be updated on the right side" (The green right pointing arrow without a plus-sign) and "Show files that will be updated on the left side" (The blue left pointing arrow without a plus-sign) (Note: this does not cover a difference in content if the left and right file time and size are identical; then use Compare by content instead)

If you want to export any of the above lists, select Tools / Export file list.

[klt]

Another newbie here on Windows 10 and I also need the first 2 listed above as below:

- If a file is on the Left but not the Right... copy it to the Right.
- If a file is newer on the Left... copy/overwrite the one on the Right

My third how to is:
- if files on the right are not on the left. I don't want them copied to the left or deleted.

Thanks in anticipation.

[Plerry]

@klt
If you want the item that only exists at the right-side not to be deleted:
Select the Update sync variant (F8)
If you want the item that only exists at the right-side to be deleted:
Select the Mirror sync variant (F8)

[klt]

Thank you Pierry