QUES: But all data is lost after the conversion as it is necessary to delete the volume If you create backup before deletion of volume then you can proceed further to convert the volume to basic

correct the punctuation.

CORRECTED: But all data is lost after the conversion as it is necessary to delete the volume. If you create backup before deletion of volume then you can proceed further to convert the volume to basic.

QUES: If it did it was too late to alter anything

correct the punctuation.

CORRECTED: If it did, it was too late to alter anything.

QUES: Then our team of sports scientists serious athletes and service technicians of many years of experience evaluate the products of different categories

correct the punctuation.

CORRECTED:
Then our team of sports scientists, serious athletes, and service technicians of many years of experience evaluate the products of different categories.