I can't mount exfat in OpenWrt

Installing and Using OpenWrt
1

I build exfat-fsck exfat-mkfs kmod-fs-exfat in my firmware,but i cant mount exfat hard disk.

root@DESKTOP-MDLNYYW:~# mount -t exfat /dev/sda3 /opt/hdd_1
mount: mounting /dev/sda3 on /opt/hdd_1 failed: No such device

root@DESKTOP-MDLNYYW:~# mount /dev/sda3 /opt/hdd_1
NTFS signature is missing.
Failed to mount '/dev/sda3': Invalid argument
The device '/dev/sda3' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
mount: mounting /dev/sda3 on /opt/hdd_1 failed: Invalid argument

2 
opkg install exfat.fsck
fsck.exfat /dev/sda3
3

thank you bro.But I don't think it's the hard drive.I think this is due to OpenWrt's compatibility with the EXFAT file system.

4

kmod-fs-exfat has been available in OpenWrt for quite a while now - and it is functional.

5

But how can I use it? mount -t exfat /dev/sda3 /opt/hdd_1 It's no use,The mount points in Luci can't find EXFAT either image

6

The one in the screenshot is my custom one and it doesn't work either

7

Do you have kmod-usb-storage installed? You may also need kmod-usb-storage-uas.

8

I installed the kmod-usb-storage and kmod-usb-storage-uas.

9 
opkg install lsblk
lsblk -f
10

install the kmod-fs-exfat exfat-mkfs and:

$ mkfs.exfat /dev/sda1
exfatprogs version : 1.1.3
Creating exFAT filesystem(/dev/sda1, cluster size=131072)

Writing volume boot record: done
Writing backup volume boot record: done
Fat table creation: done
Allocation bitmap creation: done
Upcase table creation: done
Writing root directory entry: done
Synchronizing...

exFAT format complete!
root@OpenWrt:/mnt# mount /dev/sda1 /root/test/u1
root@OpenWrt:/mnt# df -T
Filesystem           Type       1K-blocks      Used Available Use% Mounted on
/dev/root            ext4        60957748  30002260  30939104  49% /
tmpfs                tmpfs         507300       888    506412   0% /tmp
tmpfs                tmpfs            512         0       512   0% /dev
/dev/mmcblk0p1       ext4           16112     12360      3428  78% /mnt/mmcblk0p1
/dev/root            ext4        60957748  30002260  30939104  49% /opt
overlay              overlay     60957748  30002260  30939104  49% /opt/overlay2/18b645874c79f0882a0dc12c320d3c9f791043f8ff9a6507e5b7c520cbfd96b1/merged
/dev/loop0p1         vfat         1049580    711052    338528  68% /mnt/loop0p1
/dev/loop0p2         ext4        27413845  22806510   4603239  83% /mnt/loop0p2
/dev/sda1            exfat      125036544       384 125036160   0% /root/test/u1