I too took over my father's genealogy files - but before he died when he became incapacitated by dementia.
he had kept absolutely everything -- from copies of letters to Register Offices requesting certificates, to extensive details of possible family members that he eventually marked as "not of our family" to many many trees printed out in duplicate -- and each time he found a new person to add he printed out a new tree in duplicate
I have been weeding out a lot of the paperwork he kept -- and have also had to check & correct much of his work on the family where his declining mental faculties meant he made wrong assumptions
Some things I have discarded -- such as all the extensive entries he copied from GRO indexes giving all occurrences of a particular name for a particular period -- such things are readily available on-line if i should ever need them again. Also gone are vague enquiries from contacts regarding possible connections
I have kept the print-outs he made from emails giving details of people / events that might take some tracking down again -- such as detailed trees or research notes from contacts
It has been a long job -- and is still by no means finished - but interspersed with continuing his work on the tree means that i don't get too bogged down by it all!
It helped that i had already had an interest in genealogy for many years ( researching my husband's family as my own was already covered!) and so i did know what was important to keep and what could be discarded
If you are new to the hobby, i can see it could be a daunting task being thrown in the deep end - but don't be afraid to ask for any help or advice you need from the other members here
Good Luck
