Click the “All” button to transfer out all the remaining ADAs. When all ADAs are transferred out, due to the need of miner fees, the amount received is the amount after deducting the miner fees which will be less than the total amount.
2.How to deal with the message of “Transaction too big due to too many inputs”?
ADA wallet can get into a state where the value in the wallet is spread out over so many unspent transaction outputs (UTXO). The main chain of ADA has such a feature that up to 40 UTXOs for each transaction. When you try to create a single transaction spreading out over more than the maximum unspent transaction outputs (UTXO), it may result in a transfer failure.
Create a transaction that will consolidate small amounts of Ada spread out over many unspent transaction outputs (UTXO) into one UTXO by sending ADAs to yourself.