It could be for a few different reasons that you are only seeing 60MB. It is possible that the drive has physical issues, resulting in the computer only seeing a 60MB drive connected. In this case, you definitely need professional data recovery assistance. If the computer detects the full capacity drive, but there is only a 60MB partition on the drive, this could be a less severe issue that may be recoverable with data recovery software.
If the data is worth a few hundred bucks or more, I suggest you stop and explore professional data recovery services before making any DIY attempts that are likely only to make things worse.
If the data is not worth a few hundred bucks, you can try to get a full sector-by-sector clone of the drive with ddrescue under Linux.