'all variables must be declared
Option Explicit
Sub CopyData()
'this variable holds a search phrase, declared as variant as it might be text or number
Dim vSearch As Variant
'these three variables are declared as long, technically the loop might exceed 32k (integer) therefore it is safer to use long
Dim i As Long
Dim k As Long
Dim lRowToCopy As Long
'the macro prompts a user to enter the search phrase
vSearch = InputBox("Search")
'varialbe i initially declared as 1 - macro starts calculations from the 1st row
i = 1
'macro will loop until it finds a row with no records
'I called a standard XLS function COUNTA to count the number of non-blank cells
'if the macro finds a row with no records it quits the loop
Do Until WorksheetFunction.CountA(Sheets("Main").Rows(i)) = 0
'here I let the macro to continue its run despite a possible errors (explanation below)
On Error Resume Next
lRowToCopy = 0
'if Find method finds no value VBA returns an error, this is why I allowed macro to run despite that. In case of error variable lRowToCopy keeps 0 value
'if Find method finds a searched value it assigns the row number to var lRowToCopy
lRowToCopy = Sheets("Main").Rows(i).Find(What:=vSearch, LookIn:=xlValues, LookAt:=xlPart, SearchOrder:=xlByRows).Row
'here we allow macro to disiplay error messages
On Error GoTo 0
'if var lRowToCopy does not equal to 0 that means a row with a searched value has been found
If lRowToCopy > 0 Then
'this loop looks for the first blank row in 2nd sheet, I also used COUNTA to find absolutely empty row
For k = 1 To Sheets("ToCopy").Rows.Count
'when the row is found, the macro performs copy-paste operation
If WorksheetFunction.CountA(Sheets("ToCopy").Rows(k)) = 0 Then
Sheets("Main").Rows(i).Copy
Sheets("ToCopy").Select
Rows(k).Select
ActiveSheet.Paste
'do not forget to exit for loop as it will fill all empty rows in 2nd sheet
Exit For
End If
Next k
End If
i = i + 1
Loop
End Sub