Teenager Kerim Frei wants to re-establish himself in the Fulham side after a disappointing campaign.
After an impressive breakthrough season, the 19-year-old winger featured on just eight occasions last term.
Niggling injuries and a loan spell at Cardiff limited his playing time at Craven Cottage and Frei wants to prove his worth to Martin Jol's side once again.
"On a personal level, I don't think it was a great season," the Turkey international told the club's official website.
"I had two injuries and that set me back - it was difficult to get back to the level that I wanted to be at. But every day I feel a lot better, sharper, stronger and quicker.
"It's unfortunate that we now have the break because all I want to do is play football and show what I can do again.
"My number one target is to break into the first team again and impress the manager and coaches over the summer months - I want to be in their plans for the new season."
The experienced goalkeeper spent the second half of last season with the Pirates on loan from Millwall and has signed for John Ward's men after his Lions' contract expired.
Chairman Nick Higgs told the club's official website: "We are delighted to have signed Steve as he really helped turn our season around last season.
"During his time with us he became a popular member of the squad, and worked hard to get us out of danger.
"I believe it is vitally important to have a permanent goalkeeper, rather then relying on loan signings, and I believe Steve will be part of a solid defence next season."
Mildenhall's two-year deal has the option of a third year triggered by appearances.
Pack's current deal at Cheltenham expires next month and he has rejected several offers from the club to extend his contract.
The 22-year-old is keen to play at a higher level than League Two and the news has alerted a host of clubs in League One and the Championship.
Pack has impressed for Cheltenham over the last few seasons and has been named in the PFA League Two Team of the Season for the last two years.
Charlton and Sheffield Wednesday are thought to be admirers of the goalscoring midfielder and are weighing up moves for the former Portsmouth youngster.
Cheltenham would be entitled to a compensation fee for Pack if he leaves the club because he is under the age of 24.
