Sorry, not familiar with it.
Under Linux usually you can see permissions with e.g. ls
# ls -la /var/www/nextcloud/
total 160
drwxr-xr-x 13 www-data www-data 4096 Apr 30 15:58 .
drwxr-xr-x 10 root root 4096 Apr 24 21:41 ..
-rw-r--r-- 1 www-data www-data 2629 Apr 30 15:58 .htaccess
-rw-r--r-- 1 www-data www-data 101 Apr 30 15:58 .user.ini
drwxr-xr-x 33 www-data www-data 4096 Apr 30 15:58 3rdparty
-rw-r--r-- 1 www-data www-data 15752 Apr 30 15:58 AUTHORS
-rw-r--r-- 1 www-data www-data 34520 Apr 30 15:58 COPYING
drwxr-x--- 72 www-data www-data 4096 May 5 14:14 apps
drwxr-x--- 2 www-data www-data 4096 May 6 11:06 config
-rw-r--r-- 1 www-data www-data 3910 Apr 30 15:58 console.php
drwxr-xr-x 23 www-data www-data 4096 Apr 30 15:58 core
-rw-r--r-- 1 www-data www-data 5048 Apr 30 15:58 cron.php
-rw-r--r-- 1 www-data www-data 156 Apr 30 15:58 index.html
-rw-r--r-- 1 www-data www-data 2976 Apr 30 15:58 index.php
drwxr-xr-x 6 www-data www-data 4096 Apr 30 15:58 lib
-rw-r--r-- 1 www-data www-data 283 Apr 30 15:58 occ
drwxr-xr-x 2 www-data www-data 4096 Apr 30 15:58 ocm-provider
drwxr-xr-x 2 www-data www-data 4096 Apr 30 15:58 ocs
drwxr-xr-x 2 www-data www-data 4096 Apr 30 15:58 ocs-provider
-rw-r--r-- 1 www-data www-data 3056 Apr 30 15:58 public.php
-rw-r--r-- 1 www-data www-data 5235 Apr 30 15:58 remote.php
drwxr-xr-x 4 www-data www-data 4096 Apr 30 15:58 resources
-rw-r--r-- 1 www-data www-data 26 Apr 30 15:58 robots.txt
-rw-r--r-- 1 www-data www-data 2381 Apr 30 15:58 status.php
drwxr-x--- 3 www-data www-data 4096 Apr 30 15:58 themes
drwxr-x--- 2 www-data www-data 4096 Aug 16 2019 updater
-rw-r--r-- 1 www-data www-data 362 Apr 30 15:58 version.php
I would recommend to user ether rsync with key -a or -pr
rsync -a /source/folder/on/1TB /destination/folder/on/4TB
or cp with key -Rp
cp -Rp /source/folder/on/1TB /destination/folder/on/4TB
This will keep current permissions during the copy to the new drive. In this case it will be better to keep the same FS, e.g. ext4, and not ntfs or FAT32 