I am actually owning very different coins (600 XRP, 300 Data, 2 LTC, and so on) on bitfinex in my exchange wallet and I don't want to touch any of it the next 2 years. What is the best and safiest option for me what to do know because I read that the exchange wallet is not pretty safe but I don't remember why .
Thank you for your advice!
As suggested above, since you will take your coins on long term hodl, you can consider their suggested wallets, hardware wallet (Ledger Nano S) or Coinomi. In the span of 2 years, we don't know if Bitfinex will still operational so better be safe than regrets.
Both wallets supported XRP and LTC. About DATA, I see it's an ERC20 token (if that is really the coin you are holding right now) so storing it on your MEW should be fine as long as you saved your private keys.