This problem dates back to uPlay! What is it? Too slow verification.
I have an external SSD connected via 10 Gbps USB 3.2 Gen 2 port but during the verification, the client reads at 128 MB/s! It takes ages to verify AC Valhalla!
Fix this problem please! And don't tell me any ******** about verification process. Origin reads at full speed so does Steam. It is your ****ty client which you just renamed but not updated!