I am doing a clean install of Fedora 33 and I can't understand why all my space is not being used properly.

I have a 1 TB SATA HDD.

I have selected Custom Partitioning with Thin LVM Provisioning.

These are my configurations:

1 MiB       for /boot/efi (EFI System Partition)

1024 MiB for /boot

829 GiB   for /

My question is with the last root partition. 

I have not specified any size for the root partition in the anaconda installer, hence it will use all the remaining space, so it should be at least 920 GiB for the root partition right ?

Why am I getting only 829 GiB ?

Where is the ~100 GiB going ?

I can't even change it from the desired capacity field.

Why is this happening?
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