Thank you for reply. How much BTC is 19.38 satoshis per byte? Or I will ask in better way: how much BTC is 270 satoshis per byte? I ask this so i know how much BTC will be paid from my balance for fee. Please clearly define in your answer if you are referring to 19.38 or 270.

Also i haven't been changing those fees and it worked well in the past. How/where can I change quantity of those satoshis per byte? I am using Electrum.

I asked two different questions. If you don't mind, may I also ask third and fourth and fifth one please:

3. Can satoshis per byte be changed for already executed transactions?
4. Can I manually cancel transactions that are pending for too long? I need to pay urgently and those ''pending'' statuses are very annoying.
5. When or approximately when will be (IF) those pending transactions gone and money refunded?

I would also like to add the following information in case if needed for any answer i am asking for: In Tools\Preferences, I have ''Transaction fee per kb: 0 btc/kb'' (warning: unit in btc/kb and not satoshis per byte) but i don't know if this is ''miners fee''.

I tried the following too: menu Tools\Preferences\Transaction tab\tick option Dynamic Fees