Hi Darth, l went through your guides its outstanding way of securing BTC. I just have a bench of questions
1- Do l really need another USB flash to make another copy of my wallet isn't enough the backup file??
2- in case USB get physical attacked how my money supposed to be safe??
Thank you so much
  1. Always is good to have a copy of the copy. It doesn't matter in what format is that backup.
  2. What do you mean "physical attack"? destroyed? Go to point 1.
In one USB you can have multiple wallets for example. Pay attention to the details of those guides. Multiple wallets, with multiple amounts. Multiple wallets in multiple USBs or whatever backup method. In each wallet use multiple UTXOs, with multiple amounts, ready to spend for each specific situation. Example: you will not spend a UTXO of 1BTC for paying 100k sats from it. Search for a UTXO more appropriate of that amount you want to spend and try to spend it all. Do not keep everything you have in only one big UTXO and in only one walte! That's stupid.
As I said: be your own bank - THINK LIKE A BANK.
Cool cool thank you so much appreciate your support and one last questions
3- if l want to spend bitcoin from USB drive cold wallet how l am gonna do that??
4- what best option to create watch only wallet A or B??