Installing and upgrading help

Hi

> issues in reading/writing from/to a remote NAS mounted with cifs

Probably you mean to make the NAS serve Moodle its data directory https://docs.moodle.org/en/Installation_quick_guide#Create_data_directory, what we call 'moodledata'. Two problems there:

1. What do you mean by "remote"? https://en.wikipedia.org/wiki/CIFS is the old SMB/Samba network protocol for serving files through the network - in the LAN. Not suitable through networks.

2. The simple data directory of Moodle has evolved over time and now it is a bunch of places which one can configure individually. Some are useful to server big files, but slow, and others have not big throughput but need to be very fast.

Overall, I think you'll be better off, to have the fast data storage local and conneting the NAS through some https://docs.moodle.org/en/Repository.