After a long while, over a year, of having this issue and trying to resolve it on and off, I'm here asking for some help.
We have a file server that we use as a backup target for our devices, which is shared via smb/cifs. Absolutely all of our devices support SMB versions higher than 1, except for this MangoES. I have run all of the OS updates that are possible and I assume the cifs-utils package is so old that it does not work with SMB version other than 1.0.
Since I am not very familiar with the OS running on the MangoES (it's some version of ODroid) I have difficulty trying to find a package of cits-utils or whatever is necessary to be able to mount smb shared with SMB higher than version 1.