Hello,
You are correct. The screenshots show about 86.8 “Мбіт/с” in Task Manager and 87.4 MB/s in the copy window, confirming that the numeric value is measured in megabytes per second but the Ukrainian unit label is incorrect. Disk activity should display MB/s, while network activity uses Mbps. This is only a localization/display bug; the actual disk speed is not reduced.
There is no driver or system repair needed. Please press Win + F, attach these screenshots, select the Task Manager category, and include your Windows version from winver. Microsoft’s instructions are here: https://support.microsoft.com/en-us/windows/send-feedback-to-microsoft-with-the-feedback-hub-app-f59187f8-8739-22d6-ba93-f66612949332
Temporarily switching the Windows display language to English may show the correct label, but the permanent correction requires a Windows localization update. Thank you for reporting it.