Please provide some clues about what you are doing and how it fails.

Using an usb disk is generally quite simple, especially when the file system is fat.
- Plug the device and it is automatically mounted, "df -h" will tell you where.
- Write your file on it using the CLI or a file manager.
- Unmount the device before unplugging it to avoid media corruption and that's it.

Disabling the automounter makes thinks more complex so is generally not advisable.

I agree that you don't need to disable the automounter if the USB device is preformatted by another system but if you want to write a native Solaris filesystem to the USB device you will need to run fdisk and you cannot do that (without errors) with the automounter on.

I see it when I run the mount command. I can move files to my /mnt, I can see them if I do an ls. When I try to find it on my windows machine, it says the drive is empty.

I'll try making it FAT32. And let you know the results.

---------- Post updated at 02:31 PM ---------- Previous update was at 12:17 PM ----------

So, changed the USB to FAT32, checked that it was picked up by solaris, no mount issues, no moving file issues, no sync issues, still showing nothing on the usb.

Did you change the partitions in any way? Microsoft Windows doesn't show multiple partitions on removable drives...

i attempted to make a partition initially, but it kept coming back saying it couldn't partition the usb, so no.

Are you dismounting the USB device cleanly?

 
sync
umount /mnt

@kuriosity_prime What report the following commands (as root, ksh/bash syntax):

rmformat
iostat -En
for i in $(rmformat | grep "Logical Node" | nawk '{print $4}')
do
        pfexec fdisk -v -W - $i | grep -v : | grep -v '^*$'
        for p in 1 2 3 4
        do
                printf "%d " $p
                fstyp $(echo $i | sed 's/.$/'$p'/')
        done
done