FANS of the song sharing service Napster logged on by the tens of thousands for a last minute grab at music they fear a federal court may knock offline. Nearly 10_000 users logged on Saturday to just one of Napster’s more than 100 computer servers sharing nearly 2 million free MP3 song files, according to the Web site. A sample use last July saw 7_300 users sharing 800_000 files. The 9th U.S. Circuit Court of Appeals is set to rule on Monday on a lower court’s injunction against the Redwood City-based company. The recording industry sued Napster in December 1999 for copyright infringement. The appeals court stayed the injunction in July, allowing Napster to stay online. If the court reinstates the injunction, Napster could be crippled. UCLA student James Papasin, 23, said he was not panicking. Papasin said if Napster had to shut down he could easily find other ways to get free music by massaging the right Internet search engines. Despite allegations of illegal trading via the service, Napster’s base of registered users has exploded and challenged major record labels to consider different methods of reaching consumers online. Napster has remained confident that it’s service will withstand the legal test, saying on its Web site over the weekend, “We have great confidence in our legal position.” The Recording Industry Association of America, the trade group representing record labels, has argued that Napster illegally connects users bent on giving away copyrighted material without permission.