I have a Samsung SSD 750 Evo 250 GB but not all disk managers are showing the same capacity, even between partitions already created.
I don't know if is need it but I have:
8 GB RAM
Radeon RX 460
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It is a difference in units.
GiB stands for Gibibytes: 1GiB = 1024MiB.
GB stands for Gigabytes: 1GB = 1000MB.
1 gibibyte ≈ 1.074 gigabytes.
Therefore, 209.76GiB ≈ 225.28GB