What happen with my litecoin

I bought some litecoin a couple of years ago and had a litecoin in my data. Unfortunately my data crashed a month ago. And now, when I bought new, I want to transfer my old coin to the new one. How can I find the old ones and transfer to new ones?

unless you stored the private key somewhere…obtaining the private key that belongs to the public address you sent the coins to is the only way to “redeem your coins” or restoring that wallet.dat file from the crashed device to obtain the private keys