How to transfer 100k from one bank to another?

Could you please elaborate on the process for transferring a large amount of money, specifically 100,000 units, from one bank account to another? Are there any specific steps I should follow, or are there any potential complications I should be aware of when dealing with such a significant transfer? Additionally, what fees might I expect to incur, and is there a way to minimize them? Also, how long does the process typically take, and is there a way to expedite it? Lastly, are there any security measures I should take to ensure the safety of my funds during the transfer? Thank you for your time and assistance.