question: did someone email you a ramdisk file and you're not sure how to open it? maybe you have found a ramdisk file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a ramdisk file related error message.
Capitalize this past sentence correctly.
A: Did someone email you a RAMDISK file and you're not sure how to open it? Maybe you have found a RAMDISK file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a RAMDISK file related error message.

question: internal dimensions: 263 x 125 x 30 cm
Capitalize this past sentence correctly.
A: Internal dimensions: 263 x 125 x 30 cm

question: before knowing the further details of repairing damaged rar file, you need to know some common scenarios that may likely to damage your rar file.
Capitalize this past sentence correctly.
A: Before knowing the further details of repairing damaged RAR file, you need to know some common scenarios that may likely to damage your RAR file.