Add it to the antivirus whitelist
By default, the Windows built-in virus protection system will check every file processed by TeraCopy. This will significantly slow file transfers, especially if you copy many small files. However, it can be easily fixed by whitelisting TeraCopy:
Press the Win key, type Windows Security, and press Enter.
Click on Virus & threat protection.
Click on Manage settings.
Scroll to Exclusions.
Click on Add or remove exclusions.
Add Program Files\TeraCopy folder.
Change checksum method
TeraCopy computes source file checksums while copying, which can decelerate the process if you have a slower CPU or use a more time-consuming checksum method like MD5. For speedier performance, it is advisable to opt for xxHash64 or Blake 3, as they are faster alternatives.
A new copy mode utilizing multi-threading is being developed and is expected to be released in the coming months. This mode will enhance file copying speed by leveraging multiple CPU cores for file transfers and checksum calculations.