quick question on timeshift

Now that i am going to return the cheap hp china made laptop back to my friend again.

i want to do a timeshift before give it back.
Since i installed timeshift sometime ago, before i have much understanding of it.. i want to confirm what i did is ok.
Attachment 34869

Q1.
Does this photo shows that I Filtered out:
+ /root/**
+ /home/xuna/**
?
So, this means that /root/** and /home/xuna/** included in the timeshift backup ?

Attachment 34870

Q2.
This shows "USERS" home directory of this specific are included in timeshift backup.
a.
only hidden files in /home/xuna/** is timeshift backuped.
all files in /root/** are backuped.
BUT, i am confused after looking at Q1..
in Q1, we can see /home/xuna/** (this means all files in /home/xuna/** are included in timeshift backup), why then in Q2, the photo shows "only hidden files of /home/xuna/** is included in backup ?
Isn't this 2 features / option are contradicting itself ?

Q3.
Code:$lsblk
sda 8:0 0 931,5G 0 disk
sda1 8:1 0 1000M 0 part /boot
sda2 8:2 0 29,3G 0 part /
sda3 8:3 0 7,8G 0 part [SWAP]
sda4 8:4 0 893,4G 0 part /run/timeshift/backupFrom here i can tell that timeshift backup is stored in the same partition of the user /home partition, which is sda4.

Lets rule out hdd failure (just assume hdd failure won't happened..just..)
if the system somehow is corrupted be it the reason, i still can timeshift the thing back right ? or can't because they are on the same partition ?

Is there any other way that i can squeeze out an extra partition just for timeshift with the existing hdd ?

* I remember when i was in windows os, there is this good partition software that i can resize the existing partition without what-so -ever affect.

thx
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