How to modify the mount permissions for Hard Disk

Hello, i am running nextcloud docker in libreelec. Everything is working fine. Now, I have mounted hard disk in libreelec and trying to access it from nextclound (mounted as volume in docker). But nextcloud could not be able to write into hard disk as drive is accessible only to root user and nextcloud uses www-data as user. Is it possible to mount my hard disk with 777 permissions? Also, Libreelec does not support creating users and groups.

Please provide any other suggestions to access the drive from nextcloud.

I am currently on official nextcloud image deployed using docker-compose file (through portainer).
The following is the deployment configuration.

version: '2'


volumes:
nextcloud:
db:


services:
db:
image: arm64v8/mariadb:10.6
restart: always
command: --transaction-isolation=READ-COMMITTED --log-bin=binlog --binlog-format=ROW
volumes:
- /storage/venkatmakam/nextcloud/db:/var/lib/mysql
environment:
- PUID= 0
- PGID= 0
- MYSQL_ROOT_PASSWORD=passsword
- MYSQL_PASSWORD=passsword
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud


app:
image: arm64v8/nextcloud
restart: always
ports:
- 443:80
links:
- db
volumes:
- /storage/venkatmakam/nextcloud:/var/www/html
- /var/media/VENKAT_2:/VENKAT_2
- /var/media/VENKAT_1:/VENKAT_1
environment:
- PUID= 0
- PGID= 0
- MYSQL_PASSWORD=passsword
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud
- MYSQL_HOST=db

Quote from venkatmakam

I am currently on official nextcloud image deployed using docker-compose file (through portainer).
The following is the deployment configuration.

Code

version: '2'


volumes:
nextcloud:
db:


services:
db:
image: arm64v8/mariadb:10.6
restart: always
command: --transaction-isolation=READ-COMMITTED --log-bin=binlog --binlog-format=ROW
volumes:
- /storage/venkatmakam/nextcloud/db:/var/lib/mysql
environment:
- PUID= 0
- PGID= 0
- MYSQL_ROOT_PASSWORD=passsword
- MYSQL_PASSWORD=passsword
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud


app:
image: arm64v8/nextcloud
restart: always
ports:
- 443:80
links:
- db
volumes:
- /storage/venkatmakam/nextcloud:/var/www/html
- /var/media/VENKAT_2:/VENKAT_2
- /var/media/VENKAT_1:/VENKAT_1
environment:
- PUID= 0
- PGID= 0
- MYSQL_PASSWORD=passsword
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud
- MYSQL_HOST=db

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BTW, VENKAT_1, VENKAT_2 are exFAT file systems and the following are the file permissions.

drwxr-xr-x    2 root     root        131072 Feb 26 11:12 $
drwxr-xr-x    2 root     root        131072 Aug  2 17:12 0
drwxr-xr-x    2 root     root        131072 Jul  1 21:13 B
drwxr-xr-x    2 root     root        131072 Feb 28 03:52 F
drwxr-xr-x    2 root     root       1179648 Mar 26 03:14 F
drwxr-xr-x    3 root     root        131072 Feb 26 13:39 S
drwxr-xr-x   27 root     root        131072 Feb 27 22:01 U
drwxr-xr-x    2 root     root        131072 Jun  3 10:36 c
drwxr-xr-x    3 root     root        131072 Mar  5 13:42 c
drwxr-xr-x    2 root     root        131072 Mar  5 08:39 d
drwxr-xr-x    5 root     root        131072 Jul 27 21:41 i
drwxr-xr-x    2 root     root        131072 Jun  2 20:14 i
drwxr-xr-x    3 root     root        131072 Jan 26  2023 m
drwxr-xr-x   16 root     root        131072 Aug  2 12:25 n
drwxr-xr-x    4 root     root        131072 Aug  1 16:15 o
drwxr-xr-x    4 root     root        131072 Jul 30 09:03 p
drwxr-xr-x    3 root     root        131072 Mar 19 14:25 r
drwxr-xr-x    2 root     root        131072 Jul 24 15:34 t
drwxr-xr-x    2 root     root        131072 Jul 29 19:37 t
drwxr-xr-x    3 root     root        131072 Mar 24 21:11 t

Thanks for the responses. I have formatted the device to NTFS (as I wanted to use the device in windows also) and i am able to chmod the directories and able to write from nextcloud.

Just one question, is it possible to mount exFAT drive entirely with (umask 000), by modifying the udevil mount configuration?