Grammy-winning producer Jim Steinman has filed a multi-million dollar lawsuit against a data storage company for allegedly losing "priceless" recordings of classic tracks.

The Bat Out Of Hell mastermind is furious tape cassette copies of eighties hits by Bonnie Tyler and Barbra Streisand, among others, went missing from Boston-based Iron Mountain Records Management Inc in 2004.

He suspects they may have been misplaced in a New Jersey warehouse, despite assurances they would be safely stowed away in a secure facility in the mountains.

Steinman, who penned chart-topper TOTAL ECLIPSE OF THE HEART, is now suing the firm for $20 million (GBP11 million) for their negligence.

He tells the New York Post, "For a composer, it's like losing the Mona Lisa.

"They say, 'We're a mighty fortress on a mountain where nothing can happen.' Meanwhile, a couple schmucks from New Jersey show up."