Why are fees different with each wallet?

[Diver444]

Hello everyone,
 
I have an issue that is bugging me.

I am using trezor to send 8btc and the fees on one of the wallets on a 'high setting' are around $6.

If I try to send the same amount from any of the other wallets on the same devixe they rise to about $70+

Why is this?

Any help appreciated!

Thanks

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[ranochigo]

The basics first. The transaction fees are also dependent on the size of the transaction and the size of the transaction is in turn dependent on the number of inputs and/or the number of outputs.

In your first wallet, your wallet may have to spend way lesser unspent outputs to send 8BTC to that address. This means that lesser space is occupied and lesser fees will be incurred.

In your second wallet, you may have had received a lot more transactions. When spending the same amount of BTC to that address, more inputs are used in the transaction. The more inputs used, the larger the transaction size and the larger the fees incurred.