Bootcamp Error: "Your disk could not be partitioned". Windows 10 installation - REPOST

Good news.

After erasing my internal disk, I have been able to restore both macOS and my files.

I have also been able to use the Bootcamp Assistant to create a Bootcamp partition and install Windows in my Mac :)

However, it seems that I have changed the setup of my SDD. fsck_apfs commands return errors now. It seems that my SSD doesn't use containers any more. I wonder if I have lost the recovery, preboot and vm partitions during the restore process. Could you please help me to find out what is the current setup of my SDD?

The output of "diskutil list" is:

/dev/disk0 (internal):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                         500.3 GB   disk0

   1:                        EFI EFI                     314.6 MB   disk0s1

   2:                  Apple_HFS 1_LAPTOP 512GB          449.0 GB   disk0s2

   3:                 Apple_Boot                         650.0 MB   disk0s6

   4:       Microsoft Basic Data BOOTCAMP                50.3 GB    disk0s5

/dev/disk1 (external, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *2.0 TB     disk1

   1:                        EFI EFI                     209.7 MB   disk1s1

   2:                  Apple_HFS 4_HD_BACKUP 500GB       500.0 GB   disk1s2

   3:                  Apple_HFS 3_HD_BACKUP 500GB       499.9 GB   disk1s3

   4:                  Apple_HFS 2_HD_MEDIA 1TB          999.9 GB   disk1s4

Hi Loner T,

Thanks for the clarification. This was the bit I didn't understand. I thought that, just as in Windows, as soon as you re-install your macOS in a partition, you erase the contents of that partition.

I re-installed macOS in my internal SDD and everything worked perfectly. The computer boots normally from the internal SDD. The file format of the internal SDD is APFS. The re-install process has created all the required partitions (it didn't use the ones I created manually, so I deleted them). If you need any additional information, please, let me know.

Many thanks for your support and for helping to fix my computer. You have spent a lot of time to follow-up on my case and I am grateful for that. I have marked this case as "Solved".

On my side, I have never used the Terminal so much before. In fact, I am intrigued now about it, so, I have grabbed a couple of books about CLI and hope to learn about it in the future.

Thanks for following up in this new thread.

I have removed the minuscule FAT partition.

The problem is that, as I mentioned in my previous message, as soon as I select "Format: MS-DOS (FAT)", the "Size" field gets grayed out and it automatically shows 0.062 GB. Therefore, I can not edit the field, and this (0,062 GB) is the maximum amount of space that I can assign to the new FAT partition. Even though the size that I would like to assign is 40GB.

I noticed that:

1) if I select "Format: APFS", then the "Size" field is editable and I am allowed to type other values (for example, I typed in "40" GB, but I didn't click "Apply" as I understand this won't help for Windows). Maybe an option would be to try to create a 40 GB APFS partition and then try to convert it to FAT?

2) if I select the main current partition (the one with OSX), Disk Utility tells me: "This container has 404,54 GB used space. It will be resized. Its minimum size is 499,9 GB. This container can not be split because the resulting containers would be too small." If it is minimum size is 499.9 GB, then, I can not resize it down to make space for the FAT partition. See screenshot below.

Loner T wrote:

FAT partitions cannot be resized. Remove it, and create a partition of the size you want Windows to be.

The ‘overallocation’ errors can cause issues.