I am attempting to restore a backup with Time Machine for the first time. I use a Macbook air M1 2020 (its SSD is 512 GB), and an external SSD of 1 TB used only for Time Machine with this Macbook. I tried to restore a backup done a week ago, but I received the following message once I arrived in the phase "Selection the information to transfer" (I want to select them all):
"Not enough space available to transfer. Select fewer items to continue."
Notice that the sum of the items is less than 512 GB. In other posts and forums, I found that this problem was encountered with a backup in a large disk to be restored in a smaller disk.
However, I do not understand not even why I encountered this problem because the disks used are always the same. Hence, I think that the backup of the Macbook with SSD 512 GB should fit into its own SSD 512 Gb. Moreover, the free space on the Macbook internal SSD is now around 250 GB...
Question: How can I solve this issue?