Opera launches new media, file sharing service

* New free service available from Opera browsers

* Enables sharing files, pictures without uploads, from PC

* Opera says service will "reinvent the Web"

* Analyst says new service 'innovative'

* Stock down over 2 pct; up over 12 pct on the week

(Adds analyst comments, share price)

By Tarmo Virki, European technology correspondent

HELSINKI, June 16 (Reuters) - Norway's Opera Software (OPERA.OL) opened a new, free service on Tuesday that enables simple sharing of personal computers' pictures, files or music with anyone on the Internet.

The new service, which the company has said would "reinvent the Web" is part of Opera's Web browser, enables direct downloading from personal computer to personal computer and removes any need for data storage at servers in the middle. Files can be viewed with any browser.

Similar technologies have been available before for tech-savvy consumers, but these have required downloading separate software, paying usage fees, or a long process of uploading content -- limiting take-up of the services.

On Thursday last week, Opera posted a note on social networking website Twitter with a link to a web page saying Opera would "reinvent the Web" on June 16.

That heralding of the new service had helped Opera's share price surge in the past week, although it fell back slightly on Tuesday as the market digested the announcement.

"There were some expectations ahead of the announcement, so the market is only mildly disappointed, said analyst Peder Strand at SEB Enskilda

Strand added, however, that the new service looked innovative and could become an important product differentiator for Opera's browser.

Shares in Opera were down 2.7 percent by 1028 GMT, underperforming the Oslo bourse's 0.8 percent rise .OSEBX and a 1.1 percent rise for European technology shares .SX8E.