You can always perofmr incremental load:
One example of doing:
//this table.qvd was already loaded once with load * from table where date <today(); so initially it contains all data prior to today
LOAD * FROM [source\table.qvd] (qvd);
// load table today
store table into [source\table.qvd](qvd);
This way, in the next reload ; we'll have the first step; load all data untill today(); then load only today()+1 (tomorrw) and concatenate it with the exisiting table.qvd and so on
Hope this helps.