Question about file management

Lets say I have to construct a file to log some customer complaints. Its for a large supermarket consortium, there are around 4-5 thousands complaints each day. How would I do it and what are the updating techniques?

My answer would be, I would create a seq. file for each branch and save it on the centeral server. The staff of each branch would have access to their file, with user id and password. So where there is a complaint there staff registers it in the file directly and at the end of the day, these files are merged into one big file, this file could be used for statics ect..

Now I also have to make a technical recommendation how the company should store and maintain the data, including info on
Data storage/update/security/access.

Well I understand storage, security, access but dont quite understand the updating techniques?
Has anyone written such a recommendation, it might help me with this assignment.

Re: Question about file management

Front end php, back end mysql (or other DB). If u require security u can use SSL for that, if its for your local use only then u can be ur own CA Authority and generate a SSL Certficate for local use.

Re: Question about file management

Najim, no it has to be a file and its not a real case, its a assignment on file structures. I cannot use database, even it would have been better in this case.

Re: Question about file management

How about MS Access File then ? Is that possible ?

Re: Question about file management

Girl if I were you I would quit that job.