My lightroom Catalog won't Backup !

[#1]

When Hi close Lightroom Classic (LrC) I try to Backup my Catalog but get this message (see below)

My computer is in french so here is the translation in english:

Please check your folder permissions and 
make sure you have sufficient space on your backup drive and primary catalog drive.

I use my  3 To Fusion drive on iMac to do this and I have enough space on it.

What can I do ? Thank you for aany one help

If possible PLEASE answer me here:

<email address removed >

PMD

[#2]

First, verify that the backup location is what you want it to be.

Using Mac Finder, check the folder permissions on the destination.

If you are using Catalina OS, check the "security and privacy" OS tool and make sure all the options for LR are turned on.

[#3]

Thank You. I will test all this now

[#4]

You know what Y ou just saves me a good deal of trouble.

AS you said the problem was the folder permissions on the destination.

I know that was Lightroom message but I did not understand it !!

This problem was a first for me, using Lightroom for more than 10 years

Thank you verry mutch for your Help

PMD

[#5]

What MACOS?

[#6]

Version 10.15.6

[#7]

Thank you for your interest