AccountID.The address format used in Substrate-based chains is SS58. SS58 is a modification of Base-58-check from Bitcoin with some minor modifications. All Edgeware addresses will start with a lowercase letter like j, m, l, i.
Thumbs.dbfiles on Windows or
.DS_Storefiles on Mac? Those are junk, they serve no specific purpose other than making previews a bit faster. If a folder is completely empty save for such a file, you can remove the folder to clear junk off your hard drive. That does not mean you lose access to this folder forever - you can always recreate it. You have the key, after all - you're the computer's owner. It just means you want to keep your computer clean until you maybe end up needing this folder again, and then recreate it. Your address is like this folder - it gets removed from the chain when nothing is in it, but gets put back when it has at least the existential deposit.
Total: The total amount of EDG held by any address.
Free: The total amount of EDG that a user is able to transfer to another account. We get this by subtracting
Reserved: The amount of EDG that has been used by other pallets. This would include voting for governance votes as well as participating in staking. While these tokens are still owed by an account holder, they may be slashed by another subsystem or pallet. For example, when a user nominates a validator they stake tokens for the opportunity to validate transactions. In the balances pallet, their tokens will be
reserved, in the event of slashing, this amount may be deducted from the user's balance.