Lydia was a small but powerful kingdom in what is now in the west of modern Turkey. It flourished in the 6th and 7th centuries BC. The inhabitants were famous as merchants and credited with having invented gold and silver coinage and the concept of permanent retail shops.
It must be pointed out that apart from his famous visit to Egypt, Solon travelled extensively throughout the eastern Mediterranean including Lydia where he encountered Croesus the fabulously wealthy monarch. It is possible that during these trips further information regarding the history of the region was gathered and included in his notes that were to pass down through Plato’s family. It must be mentioned that Peter James has placed Atlantis in the region of Lydia near ancient Smyrna now the modern port of Izmir.
Herodotus claimed that the Etruscans migrated from Lydia to Tyrrhenia, a claim that is supported by recent studies of DNA carried out at Pavia University in Italy. Dr. Barry Fell, the renowned expert in ancient scripts, translated Etruscan inscriptions using the language of the ancient Hittites who ruled Anatolia, including Lydia, in the 2nd millennium BC.
Angelo Paratico recently proposed a connection between the Lydian capital Sardis and Sardinia during a lecture delivered in Hong Kong in 2004(a) . This idea was put forward earlier by archaeologist David Rohl  . Wikipedia includes the following information “According to Timaeus, one of Plato’s dialogues, Sardinia and its people as well, the “Sardonioi” or “Sardianoi”, might have been named after “Sardò”, a legendary woman from Sardis, capital of the ancient Kingdom of Lydia in Anatolia.”(b)
(a) https://beyondthirtynine.com/is-there-an-association-between-sardis-and-sardinia/ (link broken May 2019)