Problems after changing/upgrading HDD with mergerfs

Hi,
I recently swapped a 2GB HDD with a 4GB in my HP MicroServer G(, when it was nearly full.

What I did was:

• Pulled out all the HDDs, except the one to swap.
• Created a share for the remaining HDD
• Made a backup with rsync (in archive mode) to the new HDD
• Removed old HDD from pool, adding the new one.
• Plugging all HDDs back in

On first glance, this seemed to work, on my mac via SMB/CIFS I see the pool, stating 2TB free space, as expected.

However, I ran into a problem, when copying large files to the pool.
On my mac it says: (sorry, probably translated badly from German )

Zitat

You don't have read permission for the folder.

I can change / delete files on my share over SMB, however I can't add anything beyond the original disk's size.
What have I done wrong?

Many thanks in advance!

Thanks for your answer.
I did that before, the privileges are set to "read/write".
I also did a permission reset, deleting all ACLs (and I'd like to completely avoid them in the future, if I can)
Still the same, though.

I stumbled about mergerfs.fsck, which seems to have done the trick.

I did a "mergerfs.fsck -f newest" ,now I'm able to write files again.

THX again.